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3 | <title>Flavour Selection</title> |
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28 | <form method='post' action='FlavourSelection.php'> |
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29 | |
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30 | <h2>Flavour Selection</h2> |
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31 | |
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32 | The <code>StringFlav</code> class handles the choice of a new flavour |
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33 | in the fragmentation process, and the production of a new hadron |
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34 | from a set of input flavours. It is mainly used by the string |
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35 | fragmentation machinery (including ministrings), but also e.g. |
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36 | in some particle decays and for some beam-remnant cases. The basic |
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37 | concepts are in agreement with [<a href="Bibliography.php" target="page">And83</a>]. The baryon-sector |
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38 | implementation is based on the <code>MSTJ(12)=3</code> option of |
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39 | PYTHIA 6, i.e. new SU(6) weights scheme with at most one popcorn meson. |
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40 | |
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41 | <p/> |
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42 | The relative production rates of different particle species is |
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43 | influenced by the parameters below. Some have only an impact on |
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44 | one specific quantity, but most directly or indirectly have |
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45 | consequences for many observables. Therefore the values to use have |
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46 | to be viewed in the context of a complete <?php $filepath = $_GET["filepath"]; |
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47 | echo "<a href='Tunes.php?filepath=".$filepath."' target='page'>";?>tune</a>. |
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48 | |
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49 | <h3>New flavours</h3> |
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50 | |
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51 | The main parameters of the selection of a new flavour are |
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52 | |
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53 | <br/><br/><table><tr><td><strong>StringFlav:probStoUD </td><td></td><td> <input type="text" name="1" value="0.19" size="20"/> (<code>default = <strong>0.19</strong></code>; <code>minimum = 0.0</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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54 | the suppression of <i>s</i> quark production relative to ordinary |
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55 | <i>u</i> or <i>d</i> one. |
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56 | |
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57 | |
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58 | <br/><br/><table><tr><td><strong>StringFlav:probQQtoQ </td><td></td><td> <input type="text" name="2" value="0.09" size="20"/> (<code>default = <strong>0.09</strong></code>; <code>minimum = 0.0</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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59 | the suppression of diquark production relative to quark production, |
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60 | i.e. of baryon relative to meson production. |
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61 | |
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62 | |
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63 | <br/><br/><table><tr><td><strong>StringFlav:probSQtoQQ </td><td></td><td> <input type="text" name="3" value="1.00" size="20"/> (<code>default = <strong>1.00</strong></code>; <code>minimum = 0.0</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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64 | the suppression of strange diquark production relative to light |
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65 | diquark production, over and above the one already given by |
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66 | <code>probStoU</code>. |
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67 | |
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68 | |
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69 | <br/><br/><table><tr><td><strong>StringFlav:probQQ1toQQ0 </td><td></td><td> <input type="text" name="4" value="0.027" size="20"/> (<code>default = <strong>0.027</strong></code>; <code>minimum = 0.0</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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70 | the suppression of spin 1 diquark production relative to spin 0 one, |
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71 | apart from the factor of 3 enhancement of spin 1 from counting the |
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72 | number of states. |
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73 | |
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74 | |
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75 | <h3>Standard-meson production</h3> |
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76 | |
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77 | The bulk of the particle production corresponds to the lowest-lying |
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78 | pseudoscalar and vector multiplets. Their production rates are |
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79 | determined by the parameters in this section. |
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80 | |
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81 | <p/> |
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82 | For a given set of flavours, produced according to the probabilities |
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83 | outlined above, the ratio of vector-to-pseudocalar meson production |
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84 | is described by the parameters below. |
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85 | The maximum allowed rate for each case has been set according to |
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86 | spin-counting rules, but we expect the real rates to be lower, |
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87 | especially for lighter mesons, owing to the vector-pseudoscalar |
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88 | mass splitting. |
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89 | |
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90 | <br/><br/><table><tr><td><strong>StringFlav:mesonUDvector </td><td></td><td> <input type="text" name="5" value="0.62" size="20"/> (<code>default = <strong>0.62</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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91 | the relative production ratio vector/pseudoscalar for light |
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92 | (<i>u</i>, <i>d</i>) mesons. |
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93 | |
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94 | <br/><br/><table><tr><td><strong>StringFlav:mesonSvector </td><td></td><td> <input type="text" name="6" value="0.725" size="20"/> (<code>default = <strong>0.725</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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95 | the relative production ratio vector/pseudoscalar for strange mesons. |
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96 | |
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97 | <br/><br/><table><tr><td><strong>StringFlav:mesonCvector </td><td></td><td> <input type="text" name="7" value="1.06" size="20"/> (<code>default = <strong>1.06</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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98 | the relative production ratio vector/pseudoscalar for charm mesons. |
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99 | |
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100 | <br/><br/><table><tr><td><strong>StringFlav:mesonBvector </td><td></td><td> <input type="text" name="8" value="3.0" size="20"/> (<code>default = <strong>3.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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101 | the relative production ratio vector/pseudoscalar for bottom mesons. |
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102 | |
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103 | |
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104 | <p/> |
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105 | Inside each light-quark meson nonet, an octet-singlet mixing angle |
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106 | describes the mixing of the two flavour-diagonal isoscalar = 0 states. |
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107 | (For terminology and details see [<a href="Bibliography.php" target="page">Yao06</a>], chapter 14 on the |
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108 | quark model.) |
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109 | This angle is needed to specify the probability for such a <i>q qbar</i> |
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110 | state to project onto a specific meson. More transparent formuale are |
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111 | obtained by introducing the angle <i>alpha = theta + 54.7</i> degrees: |
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112 | <br/><i> |
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113 | f = (uubar + ddbar)/sqrt(2) * sin(alpha) + ssbar * cos(alpha)<br/> |
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114 | f' = (uubar + ddbar)/sqrt(2) * cos(alpha) - ssbar * sin(alpha) |
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115 | </i><br/> |
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116 | |
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117 | <br/><br/><table><tr><td><strong>StringFlav:thetaPS </td><td></td><td> <input type="text" name="9" value="-15." size="20"/> (<code>default = <strong>-15.</strong></code>; <code>minimum = -90.</code>; <code>maximum = 90.</code>)</td></tr></table> |
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118 | gives the mixing angle <i>theta_PS</i> in the pseudoscalar meson sector |
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119 | (which is rather poorly determined), expressed in degrees. |
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120 | Here <i>f</i> is associated with <i>eta'</i> and <i>f'</i> with |
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121 | <i>eta</i>. (This standard but counterintuitive choice is fixed up |
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122 | in the code by replacing <i>alpha -> 90^0 - alpha</i> so that |
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123 | <i>eta <-> eta'</i>; relative signs do not matter since we are |
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124 | interested in probabilities only.) |
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125 | |
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126 | |
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127 | <br/><br/><table><tr><td><strong>StringFlav:thetaV </td><td></td><td> <input type="text" name="10" value="36." size="20"/> (<code>default = <strong>36.</strong></code>; <code>minimum = -90.</code>; <code>maximum = 90.</code>)</td></tr></table> |
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128 | gives the mixing angle <i>theta_V</i> in the vector meson sector |
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129 | (which is somewhat better determined), expressed in degrees. |
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130 | Here <i>f</i> is associated with <i>omega</i> and <i>f'</i> |
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131 | with <i>phi</i>. |
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132 | |
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133 | |
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134 | <p/> |
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135 | Further, the simple model overestimates the production of <i>eta</i> |
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136 | and, in particular, <i>eta'</i> mesons, which can be rectified by |
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137 | |
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138 | <br/><br/><table><tr><td><strong>StringFlav:etaSup </td><td></td><td> <input type="text" name="11" value="0.63" size="20"/> (<code>default = <strong>0.63</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.</code>)</td></tr></table> |
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139 | the additional suppression of <i>eta</i> production, multiplying the |
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140 | normal production probability. Thus 0 means no <i>eta</i> at all |
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141 | are produced, while 1 means full rate. |
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142 | |
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143 | |
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144 | <br/><br/><table><tr><td><strong>StringFlav:etaPrimeSup </td><td></td><td> <input type="text" name="12" value="0.12" size="20"/> (<code>default = <strong>0.12</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.</code>)</td></tr></table> |
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145 | the additional suppression of <i>eta'</i> production, multiplying the |
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146 | normal production probability. Thus 0 means no <i>eta'</i> at all |
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147 | are produced, while 1 means full rate. |
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148 | |
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149 | |
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150 | <h3>Excited-meson production</h3> |
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151 | |
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152 | Several excited mesons, ie. with radial or orbital excitations, have been |
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153 | observed at non-negligible production rates. Extrapolated to all states |
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154 | a fair fraction of all particle production might proceed through such |
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155 | states. There are big uncertainties, however, since these excited |
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156 | mesons in many cases are extremely poorly known. This also means that |
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157 | the modelling of their production and decay is very primitive, and |
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158 | even that the inclusion of the production of such states may lead to a |
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159 | degraded agreement with data. Currently the default is that all such |
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160 | production is switched off. |
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161 | |
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162 | <p/> |
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163 | Parameters are provided to switch them on. By demand, this machinery |
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164 | has been made more flexible than in the past. Therefore one parameter is |
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165 | provided for each combination of heaviest flavour |
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166 | (<i>u/d</i>, <i>s</i>, <i>c</i> or <i>b</i>) and |
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167 | multiplet produced. In each case the production rate is normalized to |
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168 | that of the lowest-lying pseudoscalar of the same flavour content, as for |
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169 | the vector-meson rates introduced above. The multiplets available are the |
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170 | four obtained for one unit of orbital angular momentum, in the |
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171 | nonrelativistic classification. Using <i>J</i> to denote the sum of |
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172 | quark spin <i>S</i> and orbital angular momentum <i>L</i>, i.e. what |
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173 | would normally be called the spin of the meson, one has: |
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174 | <ul> |
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175 | <li>a pseudovector multiplet with <i>L=1, S=0, J=1</i>;</li> |
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176 | <li>a scalar multiplet with <i>L=1, S=1, J=0</i>;</li> |
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177 | <li>a pseudovector multiplet with <i>L=1, S=1, J=1</i>;</li> |
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178 | <li>a tensor multiplet with <i>L=1, S=1, J=2</i>.</li> |
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179 | </ul> |
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180 | |
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181 | The maximum allowed rate for each case has been set according to |
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182 | spin-counting rules, but we expect the real rates to be significantly |
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183 | lower, owing to mass suppression. |
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184 | |
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185 | <br/><br/><table><tr><td><strong>StringFlav:mesonUDL1S0J1 </td><td></td><td> <input type="text" name="13" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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186 | the relative pseudovector production ratio |
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187 | <i>(L=1,S=0,J=1)</i>/pseudoscalar |
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188 | for light (<i>u</i>, <i>d</i>) mesons. |
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189 | |
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190 | |
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191 | <br/><br/><table><tr><td><strong>StringFlav:mesonUDL1S1J0 </td><td></td><td> <input type="text" name="14" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.</code>)</td></tr></table> |
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192 | the relative scalar production ratio |
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193 | <i>(L=1,S=1,J=0)</i>/pseudoscalar |
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194 | for light (<i>u</i>, <i>d</i>) mesons. |
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195 | |
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196 | |
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197 | <br/><br/><table><tr><td><strong>StringFlav:mesonUDL1S1J1 </td><td></td><td> <input type="text" name="15" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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198 | the relative pseudovector production ratio |
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199 | <i>(L=1,S=1,J=1)</i>/pseudoscalar |
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200 | for light (<i>u</i>, <i>d</i>) mesons. |
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201 | |
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202 | |
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203 | <br/><br/><table><tr><td><strong>StringFlav:mesonUDL1S1J2 </td><td></td><td> <input type="text" name="16" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 5.</code>)</td></tr></table> |
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204 | the relative tensor production ratio |
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205 | <i>(L=1,S=1,J=2)</i>/pseudoscalar |
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206 | for light (<i>u</i>, <i>d</i>) mesons. |
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207 | |
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208 | |
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209 | <br/><br/><table><tr><td><strong>StringFlav:mesonSL1S0J1 </td><td></td><td> <input type="text" name="17" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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210 | the relative pseudovector production ratio |
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211 | <i>(L=1,S=0,J=1)</i>/pseudoscalar |
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212 | for strange mesons. |
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213 | |
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214 | |
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215 | <br/><br/><table><tr><td><strong>StringFlav:mesonSL1S1J0 </td><td></td><td> <input type="text" name="18" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.</code>)</td></tr></table> |
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216 | the relative scalar production ratio |
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217 | <i>(L=1,S=1,J=0)</i>/pseudoscalar |
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218 | for strange mesons. |
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219 | |
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220 | |
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221 | <br/><br/><table><tr><td><strong>StringFlav:mesonSL1S1J1 </td><td></td><td> <input type="text" name="19" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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222 | the relative pseudovector production ratio |
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223 | <i>(L=1,S=1,J=1)</i>/pseudoscalar |
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224 | for strange mesons. |
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225 | |
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226 | |
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227 | <br/><br/><table><tr><td><strong>StringFlav:mesonSL1S1J2 </td><td></td><td> <input type="text" name="20" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 5.</code>)</td></tr></table> |
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228 | the relative tensor production ratio |
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229 | <i>(L=1,S=1,J=2)</i>/pseudoscalar |
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230 | for strange mesons. |
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231 | |
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232 | |
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233 | <br/><br/><table><tr><td><strong>StringFlav:mesonCL1S0J1 </td><td></td><td> <input type="text" name="21" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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234 | the relative pseudovector production ratio |
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235 | <i>(L=1,S=0,J=1)</i>/pseudoscalar |
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236 | for charm mesons. |
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237 | |
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238 | |
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239 | <br/><br/><table><tr><td><strong>StringFlav:mesonCL1S1J0 </td><td></td><td> <input type="text" name="22" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.</code>)</td></tr></table> |
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240 | the relative scalar production ratio |
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241 | <i>(L=1,S=1,J=0)</i>/pseudoscalar |
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242 | for charm mesons. |
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243 | |
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244 | |
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245 | <br/><br/><table><tr><td><strong>StringFlav:mesonCL1S1J1 </td><td></td><td> <input type="text" name="23" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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246 | the relative pseudovector production ratio |
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247 | <i>(L=1,S=1,J=1)</i>/pseudoscalar |
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248 | for charm mesons. |
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249 | |
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250 | |
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251 | <br/><br/><table><tr><td><strong>StringFlav:mesonCL1S1J2 </td><td></td><td> <input type="text" name="24" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 5.</code>)</td></tr></table> |
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252 | the relative tensor production ratio |
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253 | <i>(L=1,S=1,J=2)</i>/pseudoscalar |
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254 | for charm mesons. |
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255 | |
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256 | |
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257 | <br/><br/><table><tr><td><strong>StringFlav:mesonBL1S0J1 </td><td></td><td> <input type="text" name="25" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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258 | the relative pseudovector production ratio |
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259 | <i>(L=1,S=0,J=1)</i>/pseudoscalar |
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260 | for bottom mesons. |
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261 | |
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262 | |
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263 | <br/><br/><table><tr><td><strong>StringFlav:mesonBL1S1J0 </td><td></td><td> <input type="text" name="26" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.</code>)</td></tr></table> |
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264 | the relative scalar production ratio |
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265 | <i>(L=1,S=1,J=0)</i>/pseudoscalar |
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266 | for bottom mesons. |
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267 | |
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268 | |
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269 | <br/><br/><table><tr><td><strong>StringFlav:mesonBL1S1J1 </td><td></td><td> <input type="text" name="27" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 3.</code>)</td></tr></table> |
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270 | the relative pseudovector production ratio |
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271 | <i>(L=1,S=1,J=1)</i>/pseudoscalar |
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272 | for bottom mesons. |
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273 | |
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274 | |
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275 | <br/><br/><table><tr><td><strong>StringFlav:mesonBL1S1J2 </td><td></td><td> <input type="text" name="28" value="0.0" size="20"/> (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 5.</code>)</td></tr></table> |
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276 | the relative tensor production ratio |
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277 | <i>(L=1,S=1,J=2)</i>/pseudoscalar |
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278 | for bottom mesons. |
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279 | |
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280 | |
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281 | <p/> |
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282 | In addition, an octet-singlet mixing angle is needed for each multiplet, |
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283 | as for the pseudoscalar and vector multiplets above. Only for the |
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284 | tensor multiplet does any determination exist; for the other multiplets |
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285 | default has been chose so that <i>ssbar</i> does not mix with the light |
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286 | quarks, and so that the <i>ssbar</i> state is the heavier of the two. |
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287 | |
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288 | <br/><br/><table><tr><td><strong>StringFlav:thetaL1S0J1 </td><td></td><td> <input type="text" name="29" value="35.3" size="20"/> (<code>default = <strong>35.3</strong></code>; <code>minimum = -90.</code>; <code>maximum = 90.</code>)</td></tr></table> |
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289 | gives the mixing angle <i>theta</i> in the <i>(L=1,S=0,J=1)</i> |
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290 | pseudovector meson sector, expressed in degrees. |
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291 | |
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292 | |
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293 | <br/><br/><table><tr><td><strong>StringFlav:thetaL1S1J0 </td><td></td><td> <input type="text" name="30" value="35.3" size="20"/> (<code>default = <strong>35.3</strong></code>; <code>minimum = -90.</code>; <code>maximum = 90.</code>)</td></tr></table> |
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294 | gives the mixing angle <i>theta</i> in the <i>(L=1,S=1,J=0)</i> |
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295 | scalar meson sector, expressed in degrees. |
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296 | |
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297 | |
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298 | <br/><br/><table><tr><td><strong>StringFlav:thetaL1S1J1 </td><td></td><td> <input type="text" name="31" value="35.3" size="20"/> (<code>default = <strong>35.3</strong></code>; <code>minimum = -90.</code>; <code>maximum = 90.</code>)</td></tr></table> |
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299 | gives the mixing angle <i>theta</i> in the <i>(L=1,S=1,J=1)</i> |
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300 | pseudovector meson sector, expressed in degrees. |
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301 | |
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302 | |
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303 | <br/><br/><table><tr><td><strong>StringFlav:thetaL1S1J2 </td><td></td><td> <input type="text" name="32" value="28.0" size="20"/> (<code>default = <strong>28.0</strong></code>; <code>minimum = -90.</code>; <code>maximum = 90.</code>)</td></tr></table> |
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304 | gives the mixing angle <i>theta</i> in the <i>(L=1,S=1,J=2)</i> |
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305 | tensor meson sector, expressed in degrees. |
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306 | |
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307 | |
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308 | <h3>Baryon production</h3> |
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309 | |
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310 | The relative rate of baryon production is mainly given by the quark |
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311 | and diquark production parameters above, plus SU(6) Clebsch-Gordans. |
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312 | The one modifiable parameter related to these coefficients is |
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313 | |
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314 | <br/><br/><table><tr><td><strong>StringFlav:decupletSup </td><td></td><td> <input type="text" name="33" value="1.0" size="20"/> (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.0</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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315 | the suppression, relative to default SU(6) factors, of decuplet |
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316 | baryon production. Default corresponds to no suppression, while 0 |
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317 | corresponds to no decuplet production at all. |
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318 | |
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319 | |
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320 | <p/> |
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321 | In addition, if popcorn production is allowed, wherein a set of mesons |
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322 | (<i>M</i>) may be producted in between the baryon (<i>B</i>) and |
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323 | the antibaryon (<i>Bbar</i>), a set of further parameters is introduced. |
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324 | Currently only the simplest scenario is implemented, wherein at most |
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325 | one intermediate meson may be produced. |
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326 | |
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327 | <br/><br/><table><tr><td><strong>StringFlav:popcornRate </td><td></td><td> <input type="text" name="34" value="0.5" size="20"/> (<code>default = <strong>0.5</strong></code>; <code>minimum = 0.</code>; <code>maximum = 2.0</code>)</td></tr></table> |
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328 | gives the relative rates of <i>B Bbar</i> and <i>B M Bbar</i> |
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329 | production, roughly as |
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330 | <br/><i> |
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331 | Prob(B M Bbar) / (Prob(B Bbar) + Prob(B M Bbar)) = |
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332 | popcornRate / (0.5 + popcornRate) |
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333 | </i><br/> |
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334 | (the complete expression depends on all the quark and diquark production |
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335 | parameters and is therefore not so useful). |
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336 | |
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337 | |
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338 | <br/><br/><table><tr><td><strong>StringFlav:popcornSpair </td><td></td><td> <input type="text" name="35" value="0.5" size="20"/> (<code>default = <strong>0.5</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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339 | extra suppression for having an <i>s sbar</i> pair shared between |
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340 | the <i>B</i> and <i>Bbar</i> in a <i>B M Bbar</i> configuration. |
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341 | |
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342 | |
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343 | <br/><br/><table><tr><td><strong>StringFlav:popcornSmeson </td><td></td><td> <input type="text" name="36" value="0.5" size="20"/> (<code>default = <strong>0.5</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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344 | extra suppression for having a strange meson <i>M</i> in a |
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345 | <i>B M Bbar</i> configuration. |
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346 | |
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347 | |
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348 | <p/> |
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349 | Finally, there are some indications that leading-baryon production |
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350 | may be further suppressed. A proper description should probably be |
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351 | based on a suppression of early production times [<a href="Bibliography.php" target="page">Ede97</a>], |
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352 | but we here only implement a simpler version where production near |
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353 | the end of a string, as defined by rank, is suppressed. The more |
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354 | detailed studies suggest that leading <i>c</i> and <i>b</i> baryon |
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355 | production will be less suppressed, so we leave it open to set |
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356 | light- and heavy-baryon suppression separately. |
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357 | |
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358 | <br/><br/><strong>StringFlav:suppressLeadingB</strong> <input type="radio" name="37" value="on"><strong>On</strong> |
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359 | <input type="radio" name="37" value="off" checked="checked"><strong>Off</strong> |
---|
360 | (<code>default = <strong>off</strong></code>)<br/> |
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361 | Suppress leading-baryon production. |
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362 | <br/><code>option </code><strong> off</strong> : No suppression. |
---|
363 | <br/><code>option </code><strong> on</strong> : Suppress the production of a diquark in the string |
---|
364 | breaking closest to a quark end of a string, by either of the factors |
---|
365 | below. This suppresses the production of first-rank baryons by the same |
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366 | amount. Indirectly also the second-rank and, if popcorn production is |
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367 | switched on, third-rank (anti)baryon production is affected. |
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368 | |
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369 | |
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370 | <br/><br/><table><tr><td><strong>StringFlav:lightLeadingBSup </td><td></td><td> <input type="text" name="38" value="0.5" size="20"/> (<code>default = <strong>0.5</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.0</code>)</td></tr></table> |
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371 | extra suppression of leading-baryon production for a light-quark |
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372 | jet, i.e. <i>d</i>, <i>u</i> or <i>s</i>, when |
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373 | <code>suppressLeadingB = on</code>. Thus 0 means no leading-baryon |
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374 | production at all, while 1 means full rate. |
---|
375 | |
---|
376 | |
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377 | <br/><br/><table><tr><td><strong>StringFlav:heavyLeadingBSup </td><td></td><td> <input type="text" name="39" value="0.9" size="20"/> (<code>default = <strong>0.9</strong></code>; <code>minimum = 0.</code>; <code>maximum = 1.0</code>)</td></tr></table> |
---|
378 | extra suppression of leading-baryon production for a heavy-quark |
---|
379 | jet, i.e. <i>c</i> or <i>b</i>, when |
---|
380 | <code>suppressLeadingB = on</code>. Thus 0 means no leading-baryon |
---|
381 | production at all, while 1 means full rate. |
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382 | |
---|
383 | |
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384 | <input type="hidden" name="saved" value="1"/> |
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385 | |
---|
386 | <?php |
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387 | echo "<input type='hidden' name='filepath' value='".$_GET["filepath"]."'/>"?> |
---|
388 | |
---|
389 | <table width="100%"><tr><td align="right"><input type="submit" value="Save Settings" /></td></tr></table> |
---|
390 | </form> |
---|
391 | |
---|
392 | <?php |
---|
393 | |
---|
394 | if($_POST["saved"] == 1) |
---|
395 | { |
---|
396 | $filepath = $_POST["filepath"]; |
---|
397 | $handle = fopen($filepath, 'a'); |
---|
398 | |
---|
399 | if($_POST["1"] != "0.19") |
---|
400 | { |
---|
401 | $data = "StringFlav:probStoUD = ".$_POST["1"]."\n"; |
---|
402 | fwrite($handle,$data); |
---|
403 | } |
---|
404 | if($_POST["2"] != "0.09") |
---|
405 | { |
---|
406 | $data = "StringFlav:probQQtoQ = ".$_POST["2"]."\n"; |
---|
407 | fwrite($handle,$data); |
---|
408 | } |
---|
409 | if($_POST["3"] != "1.00") |
---|
410 | { |
---|
411 | $data = "StringFlav:probSQtoQQ = ".$_POST["3"]."\n"; |
---|
412 | fwrite($handle,$data); |
---|
413 | } |
---|
414 | if($_POST["4"] != "0.027") |
---|
415 | { |
---|
416 | $data = "StringFlav:probQQ1toQQ0 = ".$_POST["4"]."\n"; |
---|
417 | fwrite($handle,$data); |
---|
418 | } |
---|
419 | if($_POST["5"] != "0.62") |
---|
420 | { |
---|
421 | $data = "StringFlav:mesonUDvector = ".$_POST["5"]."\n"; |
---|
422 | fwrite($handle,$data); |
---|
423 | } |
---|
424 | if($_POST["6"] != "0.725") |
---|
425 | { |
---|
426 | $data = "StringFlav:mesonSvector = ".$_POST["6"]."\n"; |
---|
427 | fwrite($handle,$data); |
---|
428 | } |
---|
429 | if($_POST["7"] != "1.06") |
---|
430 | { |
---|
431 | $data = "StringFlav:mesonCvector = ".$_POST["7"]."\n"; |
---|
432 | fwrite($handle,$data); |
---|
433 | } |
---|
434 | if($_POST["8"] != "3.0") |
---|
435 | { |
---|
436 | $data = "StringFlav:mesonBvector = ".$_POST["8"]."\n"; |
---|
437 | fwrite($handle,$data); |
---|
438 | } |
---|
439 | if($_POST["9"] != "-15.") |
---|
440 | { |
---|
441 | $data = "StringFlav:thetaPS = ".$_POST["9"]."\n"; |
---|
442 | fwrite($handle,$data); |
---|
443 | } |
---|
444 | if($_POST["10"] != "36.") |
---|
445 | { |
---|
446 | $data = "StringFlav:thetaV = ".$_POST["10"]."\n"; |
---|
447 | fwrite($handle,$data); |
---|
448 | } |
---|
449 | if($_POST["11"] != "0.63") |
---|
450 | { |
---|
451 | $data = "StringFlav:etaSup = ".$_POST["11"]."\n"; |
---|
452 | fwrite($handle,$data); |
---|
453 | } |
---|
454 | if($_POST["12"] != "0.12") |
---|
455 | { |
---|
456 | $data = "StringFlav:etaPrimeSup = ".$_POST["12"]."\n"; |
---|
457 | fwrite($handle,$data); |
---|
458 | } |
---|
459 | if($_POST["13"] != "0.0") |
---|
460 | { |
---|
461 | $data = "StringFlav:mesonUDL1S0J1 = ".$_POST["13"]."\n"; |
---|
462 | fwrite($handle,$data); |
---|
463 | } |
---|
464 | if($_POST["14"] != "0.0") |
---|
465 | { |
---|
466 | $data = "StringFlav:mesonUDL1S1J0 = ".$_POST["14"]."\n"; |
---|
467 | fwrite($handle,$data); |
---|
468 | } |
---|
469 | if($_POST["15"] != "0.0") |
---|
470 | { |
---|
471 | $data = "StringFlav:mesonUDL1S1J1 = ".$_POST["15"]."\n"; |
---|
472 | fwrite($handle,$data); |
---|
473 | } |
---|
474 | if($_POST["16"] != "0.0") |
---|
475 | { |
---|
476 | $data = "StringFlav:mesonUDL1S1J2 = ".$_POST["16"]."\n"; |
---|
477 | fwrite($handle,$data); |
---|
478 | } |
---|
479 | if($_POST["17"] != "0.0") |
---|
480 | { |
---|
481 | $data = "StringFlav:mesonSL1S0J1 = ".$_POST["17"]."\n"; |
---|
482 | fwrite($handle,$data); |
---|
483 | } |
---|
484 | if($_POST["18"] != "0.0") |
---|
485 | { |
---|
486 | $data = "StringFlav:mesonSL1S1J0 = ".$_POST["18"]."\n"; |
---|
487 | fwrite($handle,$data); |
---|
488 | } |
---|
489 | if($_POST["19"] != "0.0") |
---|
490 | { |
---|
491 | $data = "StringFlav:mesonSL1S1J1 = ".$_POST["19"]."\n"; |
---|
492 | fwrite($handle,$data); |
---|
493 | } |
---|
494 | if($_POST["20"] != "0.0") |
---|
495 | { |
---|
496 | $data = "StringFlav:mesonSL1S1J2 = ".$_POST["20"]."\n"; |
---|
497 | fwrite($handle,$data); |
---|
498 | } |
---|
499 | if($_POST["21"] != "0.0") |
---|
500 | { |
---|
501 | $data = "StringFlav:mesonCL1S0J1 = ".$_POST["21"]."\n"; |
---|
502 | fwrite($handle,$data); |
---|
503 | } |
---|
504 | if($_POST["22"] != "0.0") |
---|
505 | { |
---|
506 | $data = "StringFlav:mesonCL1S1J0 = ".$_POST["22"]."\n"; |
---|
507 | fwrite($handle,$data); |
---|
508 | } |
---|
509 | if($_POST["23"] != "0.0") |
---|
510 | { |
---|
511 | $data = "StringFlav:mesonCL1S1J1 = ".$_POST["23"]."\n"; |
---|
512 | fwrite($handle,$data); |
---|
513 | } |
---|
514 | if($_POST["24"] != "0.0") |
---|
515 | { |
---|
516 | $data = "StringFlav:mesonCL1S1J2 = ".$_POST["24"]."\n"; |
---|
517 | fwrite($handle,$data); |
---|
518 | } |
---|
519 | if($_POST["25"] != "0.0") |
---|
520 | { |
---|
521 | $data = "StringFlav:mesonBL1S0J1 = ".$_POST["25"]."\n"; |
---|
522 | fwrite($handle,$data); |
---|
523 | } |
---|
524 | if($_POST["26"] != "0.0") |
---|
525 | { |
---|
526 | $data = "StringFlav:mesonBL1S1J0 = ".$_POST["26"]."\n"; |
---|
527 | fwrite($handle,$data); |
---|
528 | } |
---|
529 | if($_POST["27"] != "0.0") |
---|
530 | { |
---|
531 | $data = "StringFlav:mesonBL1S1J1 = ".$_POST["27"]."\n"; |
---|
532 | fwrite($handle,$data); |
---|
533 | } |
---|
534 | if($_POST["28"] != "0.0") |
---|
535 | { |
---|
536 | $data = "StringFlav:mesonBL1S1J2 = ".$_POST["28"]."\n"; |
---|
537 | fwrite($handle,$data); |
---|
538 | } |
---|
539 | if($_POST["29"] != "35.3") |
---|
540 | { |
---|
541 | $data = "StringFlav:thetaL1S0J1 = ".$_POST["29"]."\n"; |
---|
542 | fwrite($handle,$data); |
---|
543 | } |
---|
544 | if($_POST["30"] != "35.3") |
---|
545 | { |
---|
546 | $data = "StringFlav:thetaL1S1J0 = ".$_POST["30"]."\n"; |
---|
547 | fwrite($handle,$data); |
---|
548 | } |
---|
549 | if($_POST["31"] != "35.3") |
---|
550 | { |
---|
551 | $data = "StringFlav:thetaL1S1J1 = ".$_POST["31"]."\n"; |
---|
552 | fwrite($handle,$data); |
---|
553 | } |
---|
554 | if($_POST["32"] != "28.0") |
---|
555 | { |
---|
556 | $data = "StringFlav:thetaL1S1J2 = ".$_POST["32"]."\n"; |
---|
557 | fwrite($handle,$data); |
---|
558 | } |
---|
559 | if($_POST["33"] != "1.0") |
---|
560 | { |
---|
561 | $data = "StringFlav:decupletSup = ".$_POST["33"]."\n"; |
---|
562 | fwrite($handle,$data); |
---|
563 | } |
---|
564 | if($_POST["34"] != "0.5") |
---|
565 | { |
---|
566 | $data = "StringFlav:popcornRate = ".$_POST["34"]."\n"; |
---|
567 | fwrite($handle,$data); |
---|
568 | } |
---|
569 | if($_POST["35"] != "0.5") |
---|
570 | { |
---|
571 | $data = "StringFlav:popcornSpair = ".$_POST["35"]."\n"; |
---|
572 | fwrite($handle,$data); |
---|
573 | } |
---|
574 | if($_POST["36"] != "0.5") |
---|
575 | { |
---|
576 | $data = "StringFlav:popcornSmeson = ".$_POST["36"]."\n"; |
---|
577 | fwrite($handle,$data); |
---|
578 | } |
---|
579 | if($_POST["37"] != "off") |
---|
580 | { |
---|
581 | $data = "StringFlav:suppressLeadingB = ".$_POST["37"]."\n"; |
---|
582 | fwrite($handle,$data); |
---|
583 | } |
---|
584 | if($_POST["38"] != "0.5") |
---|
585 | { |
---|
586 | $data = "StringFlav:lightLeadingBSup = ".$_POST["38"]."\n"; |
---|
587 | fwrite($handle,$data); |
---|
588 | } |
---|
589 | if($_POST["39"] != "0.9") |
---|
590 | { |
---|
591 | $data = "StringFlav:heavyLeadingBSup = ".$_POST["39"]."\n"; |
---|
592 | fwrite($handle,$data); |
---|
593 | } |
---|
594 | fclose($handle); |
---|
595 | } |
---|
596 | |
---|
597 | ?> |
---|
598 | </body> |
---|
599 | </html> |
---|
600 | |
---|
601 | <!-- Copyright (C) 2012 Torbjorn Sjostrand --> |
---|