1 | ! File: main04.cmnd |
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2 | ! This file contains commands to be read in for a Pythia8 run. |
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3 | ! Lines not beginning with a letter or digit are comments. |
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4 | ! Names are case-insensitive - but spellings-sensitive! |
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5 | ! The changes here are illustrative, not always physics-motivated. |
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6 | |
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7 | ! 1) Settings used in the main program. |
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8 | Main:numberOfEvents = 1000 ! number of events to generate |
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9 | Main:timesAllowErrors = 10 ! how many aborts before run stops |
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10 | |
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11 | ! 2) Settings related to output in init(), next() and stat(). |
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12 | Init:showChangedSettings = on ! list changed settings |
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13 | Init:showChangedParticleData = off ! list changed particle data |
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14 | Next:numberCount = 500 ! print message every n events |
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15 | Next:numberShowInfo = 3 ! print event information n times |
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16 | Next:numberShowProcess = 0 ! print process record n times |
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17 | Next:numberShowEvent = 0 ! print event record n times |
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18 | |
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19 | ! 3) Beam parameter settings. Values below agree with default ones. |
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20 | Beams:idA = 2212 ! first beam, p = 2212, pbar = -2212 |
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21 | Beams:idB = 2212 ! second beam, p = 2212, pbar = -2212 |
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22 | Beams:eCM = 14000. ! CM energy of collision |
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23 | |
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24 | ! 4) Settings for the hard-process generation. |
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25 | SoftQCD:all = on ! Allow total sigma = elastic/SD/DD/ND |
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26 | ! Optionally only study one or a few processes at a time. |
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27 | #SoftQCD:elastic = on ! Elastic |
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28 | #SoftQCD:singleDiffractive = on ! Single diffractive |
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29 | #SoftQCD:doubleDiffractive = on ! Double diffractive |
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30 | #SoftQCD:centralDiffractive = on ! Central diffractive |
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31 | #SoftQCD:minbias = on ! Nondiffractive inelastic |
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32 | |
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33 | ! 5) Optionally switch on hand-set cross section and Coulomb term. |
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34 | ! Note: these values are illustrative only, not to be taken seriously. |
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35 | #SigmaTotal:setOwn = on ! set your own total/elastic/diffr. sigma |
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36 | #SigmaTotal:sigmaTot = 106. ! total cross section (excluding Coulomb) |
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37 | #SigmaTotal:sigmaXX = 5. ! reduce double diffractive cross section |
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38 | #SigmaElastic:setOwn = on ! suboption for Coulomb term in elastic |
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39 | #SigmaElastic:tAbsMin = 4e-5 ! divergence requires lower cutoff |
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40 | |
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41 | ! 6) Optionally select diffractive model. |
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42 | Diffraction:PomFlux = 5 ! the MBR model for diffraction |
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43 | |
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44 | ! 7) Multiparton interactions and impact parameter picture. |
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45 | ! Note: these values are illustrative only, not to be taken seriously. |
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46 | MultipartonInteractions:pT0Ref = 2. |
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47 | MultipartonInteractions:ecmRef = 1960. |
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48 | MultipartonInteractions:ecmPow = 0.16 |
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49 | MultipartonInteractions:pTmin = 0.2 |
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50 | MultipartonInteractions:bProfile = 2 |
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51 | #MultipartonInteractions:coreRadius = 0.4 |
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52 | #MultipartonInteractions:coreFraction = 0.5 |
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53 | MultipartonInteractions:expPow = 1. |
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54 | |
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55 | ! 8) Other settings. Can be expanded as desired. |
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56 | ! Note: may overwrite some of the values above, so watch out. |
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57 | #Tune:pp = 6 ! use Tune 4Cx |
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58 | |
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