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File indexing completed on 2022-02-16 06:12:30

0001 #Default Pythia Paramters for Hydjet & Pyquen
0002 
0003 import FWCore.ParameterSet.Config as cms
0004 
0005 from Configuration.Generator.PythiaUESettings_cfi import *
0006 
0007 collisionParameters4TeV = cms.PSet(aBeamTarget = cms.double(208.0), ## beam/target atomic number
0008                                comEnergy = cms.double(4000.0)
0009                                )
0010 
0011 collisionParameters2760GeV = cms.PSet(aBeamTarget = cms.double(208.0), ## beam/target atomic number
0012                                    comEnergy = cms.double(2760.0)
0013                                    )
0014 
0015 collisionParameters = collisionParameters2760GeV.clone()
0016 
0017 qgpParameters = cms.PSet(qgpInitialTemperature = cms.double(1.0), ## initial temperature of QGP; allowed range [0.2,2.0]GeV;
0018                          qgpProperTimeFormation = cms.double(0.1), ## proper time of QGP formation; allowed range [0.01,10.0]fm/c;
0019                          hadronFreezoutTemperature = cms.double(0.14),
0020                          doRadiativeEnLoss = cms.bool(True), ## if true, perform partonic radiative en loss
0021                          doCollisionalEnLoss = cms.bool(False),
0022                          qgpNumQuarkFlavor = cms.int32(0),  ## number of active quark flavors in qgp; allowed values: 0,1,2,3 
0023                          )
0024 
0025 pyquenParameters  = cms.PSet(doIsospin = cms.bool(True),
0026                              angularSpectrumSelector = cms.int32(0), ## angular emitted gluon spectrum :
0027                              embeddingMode = cms.int32(0),
0028                              )
0029 
0030 hydjetParameters = cms.PSet(sigmaInelNN = cms.double(58),
0031                             shadowingSwitch = cms.int32(0),
0032                             nMultiplicity = cms.int32(21500),
0033                             fracSoftMultiplicity = cms.double(1.),
0034                             maxLongitudinalRapidity = cms.double(4.5),
0035                             maxTransverseRapidity = cms.double(1.),
0036                             rotateEventPlane = cms.bool(True),
0037                             allowEmptyEvents = cms.bool(False),
0038                             embeddingMode = cms.int32(0)                            
0039                             )
0040 
0041 pyquenPythiaDefaultBlock = cms.PSet(
0042     pythiaUESettingsBlock,
0043     hydjetPythiaDefault = cms.vstring('MSEL=0   ! user processes',
0044                                       'CKIN(3)=6.',# ! ptMin
0045                                       'MSTP(81)=0'
0046                                       ),
0047     ppDefault = cms.vstring('MSEL=1   ! QCD hight pT processes (only jets)',
0048                             'CKIN(3)=6.',# ! ptMin
0049                             'MSTP(81)=0'
0050                             ),
0051     pythiaHirootDefault = cms.vstring('MSEL=0', # ! Only user defined processes,  
0052                                 'MSTU(21)=1', # ! to avoid stopping run',
0053                                 'PARU(14)=1.', # ! tolerance parameter to adjust fragmentation',
0054                                 'MSTP(81)=0', # ! pp multiple scattering off',
0055                                 'PMAS(5,1)=4.8', # ! b quark mass',
0056                                 'PMAS(6,1)=175.0', # ! t quark mass'
0057                                 'CKIN(3)=7.',# ! ptMin
0058                                 'MSTJ(22)=2',
0059                                 'PARJ(71)=10.', # Decays only if life time < 10mm
0060                                 'PARP(67)=1.',
0061                                 'PARP(82)=1.9',
0062                                 'PARP(85)=0.33',
0063                                 'PARP(86)=0.66',
0064                                 'PARP(89)=1000.',
0065                                 'PARP(91)=1.0',
0066                                 'MSTJ(11)=3',
0067                                 'MSTJ(22)=2'                                
0068                                 ),
0069     ppJets = cms.vstring('MSEL=1   ! QCD hight pT processes'),
0070     customProcesses = cms.vstring('MSEL=0   ! User processes'),
0071     pythiaJets = cms.vstring('MSUB(11)=1', # q+q->q+q
0072                              'MSUB(12)=1', # q+qbar->q+qbar
0073                              'MSUB(13)=1', # q+qbar->g+g
0074                              'MSUB(28)=1', # q+g->q+g
0075                              'MSUB(53)=1', # g+g->q+qbar
0076                              'MSUB(68)=1' # g+g->g+g
0077                              ),
0078     pythiaPromptPhotons = cms.vstring('MSUB(14)=1', # q+qbar->g+gamma
0079                                       'MSUB(18)=1', # q+qbar->gamma+gamma
0080                                       'MSUB(29)=1', # q+g->q+gamma
0081                                       'MSUB(114)=1', # g+g->gamma+gamma
0082                                       'MSUB(115)=1' # g+g->g+gamma
0083                                       ),
0084 
0085     pythiaWeakBosons = cms.vstring('MSUB(1)=1',
0086                                    'MSUB(2)=1'),
0087     
0088     pythiaZjets = cms.vstring('MSUB(15)=1',
0089                               'MSUB(30)=1'),
0090     
0091     pythiaCharmoniumNRQCD = cms.vstring('MSUB(421) = 1',
0092                                         'MSUB(422) = 1',
0093                                         'MSUB(423) = 1',
0094                                         'MSUB(424) = 1',
0095                                         'MSUB(425) = 1',
0096                                         'MSUB(426) = 1',
0097                                         'MSUB(427) = 1',
0098                                         'MSUB(428) = 1',
0099                                         'MSUB(429) = 1',
0100                                         'MSUB(430) = 1',
0101                                         'MSUB(431) = 1',
0102                                         'MSUB(432) = 1',
0103                                         'MSUB(433) = 1',
0104                                         'MSUB(434) = 1',
0105                                         'MSUB(435) = 1',
0106                                         'MSUB(436) = 1',
0107                                         'MSUB(437) = 1',
0108                                         'MSUB(438) = 1',
0109                                         'MSUB(439) = 1'
0110                                         ),
0111 
0112     pythiaBottomoniumNRQCD = cms.vstring('MSUB(461) = 1',
0113                                          'MSUB(462) = 1',
0114                                          'MSUB(463) = 1',
0115                                          'MSUB(464) = 1',
0116                                          'MSUB(465) = 1',
0117                                          'MSUB(466) = 1',
0118                                          'MSUB(467) = 1',
0119                                          'MSUB(468) = 1',
0120                                          'MSUB(469) = 1',
0121                                          'MSUB(470) = 1',
0122                                          'MSUB(471) = 1',
0123                                          'MSUB(472) = 1',
0124                                          'MSUB(473) = 1',
0125                                          'MSUB(474) = 1',
0126                                          'MSUB(475) = 1',
0127                                          'MSUB(476) = 1',
0128                                          'MSUB(477) = 1',
0129                                          'MSUB(478) = 1',
0130                                          'MSUB(479) = 1',
0131                                          ),
0132 
0133     pythiaQuarkoniaSettings = cms.vstring('PARP(141)=1.16',   # Matrix Elements
0134                                           'PARP(142)=0.0119',
0135                                           'PARP(143)=0.01',
0136                                           'PARP(144)=0.01',
0137                                           'PARP(145)=0.05',
0138                                           'PARP(146)=9.28',
0139                                           'PARP(147)=0.15',
0140                                           'PARP(148)=0.02',
0141                                           'PARP(149)=0.02',
0142                                           'PARP(150)=0.085',                                                
0143                                           # Meson spin
0144                                           'PARJ(13)=0.60',
0145                                           'PARJ(14)=0.162',
0146                                           'PARJ(15)=0.018',
0147                                           'PARJ(16)=0.054',
0148                                           # Polarization
0149                                           'MSTP(145)=0',
0150                                           'MSTP(146)=0',
0151                                           'MSTP(147)=0',
0152                                           'MSTP(148)=1',
0153                                           'MSTP(149)=1',
0154                                           # Chi_c branching ratios
0155                                           'BRAT(861)=0.202',
0156                                           'BRAT(862)=0.798',
0157                                           'BRAT(1501)=0.013',
0158                                           'BRAT(1502)=0.987',
0159                                           'BRAT(1555)=0.356',
0160                                           'BRAT(1556)=0.644'
0161                                           ),
0162     
0163     pythiaZtoMuons = cms.vstring("MDME(174,1)=0",          # !Z decay into d dbar,
0164                                  "MDME(175,1)=0",          # !Z decay into u ubar,
0165                                  "MDME(176,1)=0",          # !Z decay into s sbar,
0166                                  "MDME(177,1)=0",          # !Z decay into c cbar,
0167                                  "MDME(178,1)=0",          # !Z decay into b bbar,
0168                                  "MDME(179,1)=0",          # !Z decay into t tbar,
0169                                  "MDME(182,1)=0",          # !Z decay into e- e+,
0170                                  "MDME(183,1)=0",          # !Z decay into nu_e nu_ebar,
0171                                  "MDME(184,1)=1",          # !Z decay into mu- mu+,
0172                                  "MDME(185,1)=0",          # !Z decay into nu_mu nu_mubar,
0173                                  "MDME(186,1)=0",          # !Z decay into tau- tau+,
0174                                  "MDME(187,1)=0"           # !Z decay into nu_tau nu_taubar
0175                                  ),
0176 
0177 
0178     pythiaZtoElectrons = cms.vstring("MDME(174,1)=0",          # !Z decay into d dbar,
0179                                      "MDME(175,1)=0",          # !Z decay into u ubar,
0180                                      "MDME(176,1)=0",          # !Z decay into s sbar,
0181                                      "MDME(177,1)=0",          # !Z decay into c cbar,
0182                                      "MDME(178,1)=0",          # !Z decay into b bbar,
0183                                      "MDME(179,1)=0",          # !Z decay into t tbar,
0184                                      "MDME(182,1)=1",          # !Z decay into e- e+,
0185                                      "MDME(183,1)=0",          # !Z decay into nu_e nu_ebar,
0186                                      "MDME(184,1)=0",          # !Z decay into mu- mu+,
0187                                      "MDME(185,1)=0",          # !Z decay into nu_mu nu_mubar,
0188                                      "MDME(186,1)=0",          # !Z decay into tau- tau+,
0189                                      "MDME(187,1)=0"           # !Z decay into nu_tau nu_taubar
0190                                      ),
0191     
0192     pythiaZtoMuonsAndElectrons = cms.vstring("MDME(174,1)=0",          # !Z decay into d dbar,
0193                                              "MDME(175,1)=0",          # !Z decay into u ubar,
0194                                              "MDME(176,1)=0",          # !Z decay into s sbar,
0195                                              "MDME(177,1)=0",          # !Z decay into c cbar,
0196                                              "MDME(178,1)=0",          # !Z decay into b bbar,
0197                                              "MDME(179,1)=0",          # !Z decay into t tbar,
0198                                              "MDME(182,1)=1",          # !Z decay into e- e+,
0199                                              "MDME(183,1)=0",          # !Z decay into nu_e nu_ebar,
0200                                              "MDME(184,1)=1",          # !Z decay into mu- mu+,
0201                                              "MDME(185,1)=0",          # !Z decay into nu_mu nu_mubar,
0202                                              "MDME(186,1)=0",          # !Z decay into tau- tau+,
0203                                              "MDME(187,1)=0"           # !Z decay into nu_tau nu_taubar
0204                                              ),
0205     
0206     pythiaUpsilonToMuons = cms.vstring('BRAT(1034) = 0 ',  # switch off',
0207                                        'BRAT(1035) = 1 ',  # switch on',
0208                                        'BRAT(1036) = 0 ',  # switch off',
0209                                        'BRAT(1037) = 0 ',  # switch off',
0210                                        'BRAT(1038) = 0 ',  # switch off',
0211                                        'BRAT(1039) = 0 ',  # switch off',
0212                                        'BRAT(1040) = 0 ',  # switch off',
0213                                        'BRAT(1041) = 0 ',  # switch off',
0214                                        'BRAT(1042) = 0 ',  # switch off',
0215                                        'MDME(1034,1) = 0 ',  # switch off',
0216                                        'MDME(1035,1) = 1 ',  # switch on',
0217                                        'MDME(1036,1) = 0 ',  # switch off',
0218                                        'MDME(1037,1) = 0 ',  # switch off',
0219                                        'MDME(1038,1) = 0 ',  # switch off',
0220                                        'MDME(1039,1) = 0 ',  # switch off',
0221                                        'MDME(1040,1) = 0 ',  # switch off',
0222                                        'MDME(1041,1) = 0 ',  # switch off',
0223                                        'MDME(1042,1) = 0 ',  # switch off'
0224                                        ),
0225 
0226    pythiaJpsiToMuons = cms.vstring('BRAT(858) = 0 ',  # switch off',
0227                                    'BRAT(859) = 1 ',  # switch on',
0228                                    'BRAT(860) = 0 ',  # switch off',
0229                                    'MDME(858,1) = 0 ',  # switch off',
0230                                    'MDME(859,1) = 1 ',  # switch on',
0231                                    'MDME(860,1) = 0 ',  # switch off'
0232                                    ),
0233     
0234     pythiaMuonCandidates = cms.vstring(
0235     'CKIN(3)=20',
0236     'MSTJ(22)=2',
0237     'PARJ(71)=40.'
0238     ),
0239     myParameters = cms.vstring(
0240     )
0241     
0242 )    
0243 
0244 # This one is not to be used
0245 impactParameters = cms.PSet(cFlag = cms.int32(1),
0246                             bFixed = cms.double(0),
0247                             bMin = cms.double(0),
0248                             bMax = cms.double(30)
0249                             )
0250