00001 * STEERING FILE FOR CASCADE 00002 * 00003 * number of events to be generated 00004 * 00005 *NEVENT 1000 00006 * 00007 *----------------------------------------------------------------------- 00008 * GCAS 0 / ! CASCADE PARAMETERS 00009 *----------------------------------------------------------------------- 00010 * 00011 *VAR-NAM 1.INDX 2.INDX NEW-VALUE ! COMMENT IF NEEDED 00012 * ------- ------ ------ -------- --------------------------------- 00013 * 00014 * +++++++++++++++++ Kinematic parameters +++++++++++++++ 00015 * 00016 * 00017 'PBE1' 1 0 -7000. ! Beam energy 00018 'KBE1' 1 0 2212 ! -11: positron, 22: photon 2212: proton 00019 'IRE1' 1 0 1 ! 0: beam 1 has no structure 00020 * ! 1: beam 1 has structure 00021 * 00022 'PBE2' 1 0 7000. ! Beam energy 00023 'KBE2' 1 0 2212 ! 11: electron, 22: photon 2212: proton 00024 'IRE2' 1 0 1 ! 0: beam 3 has no structure 00025 * ! 1: beam 2 has structure 00026 * 00027 * 00028 'QMIN' 1 0 0. ! (D=5.0) minimum Q2 to be generated 00029 *'QMAX' 1 0 100 ! (D=10.D8) maximum Q2 to be generated 00030 * 00031 *'YMIN' 1 0 0.0001 ! (D=0.) YMIN of photon 00032 *'YMAX' 1 0 0.99 ! (D=1.) YMAX of photon 00033 * 00034 *'THEI' 1 0 0. ! (D=0.) minimum scattering angle for e 00035 *'THEM' 1 0 180 ! (D=180.) maximum scattering angle for e 00036 * 00037 'NFLA' 1 0 5 ! (D=5) nr of flavours used in str.fct 00038 * 00039 'MULT' 1 0 0 ! (D=0) multiple scattering 00040 * 00041 * +++++++++++++++ Hard subprocess selection ++++++++++++++++++ 00042 * 00043 'IPRO' 1 0 11 ! (D=1) 00044 * ! 2: J/psi g 00045 * ! 10: Light quarks 00046 * ! 11: Heavy quarks 00047 * ! 102: g g -> Higgs 00048 * 00049 'IHFL' 1 0 6 ! (D=4) produced flavour for IPRO=11 00050 * ! 4: charm 00051 * ! 5: bottom 00052 * 00053 *'PTCU' 1 0 1000. ! (D=0) p_t **2 cut for process 00054 * 00055 * 00056 * ++++++++++++ Parton shower and fragmentation ++++++++++++ 00057 * 00058 'NFRA' 1 0 1 ! (D=1) Fragmentation on=1 off=0 00059 * 00060 'IFPS' 1 0 3 ! (D=3) Parton shower 00061 * ! 0: off 00062 * ! 1: initial state PS 00063 * ! 2: final state PS 00064 * ! 3: initial and final state PS 00065 * 00066 'ITIM' 1 0 0 ! 0: timlike partons may not shower 00067 * ! 1: timlike partons may shower 00068 * 00069 'ICCF' 1 0 1 ! (D=1) Evolution equation 00070 * ! 1: CCFM 00071 * ! 0: DGLAP 00072 * 00073 * +++++++++++++ Structure functions and scales +++++++++++++ 00074 * 00075 'IRAM' 1 0 0 ! (D=0) Running of alpha_em(Q2) 00076 * ! 0: fixed 00077 * ! 1: running 00078 * 00079 'IRAS' 1 0 1 ! (D=1) Running of alpha_s(MU2) 00080 * ! 0: fixed alpha_s=0.3 00081 * ! 1: running 00082 * 00083 'IQ2S' 1 0 3 ! (D=1) Scale MU2 of alpha_s 00084 * ! 1: MU2= 4*m**2 (only for heavy quarks) 00085 * ! 2: MU2 = shat(only for heavy quarks) 00086 * ! 3: MU2= 4*m**2 + pt**2 00087 * ! 4: MU2 = Q2 00088 * ! 5: MU2 = Q2 + pt**2 00089 * ! 6: MU2 = k_t**2 00090 'SCAL' 1 0 1.0 ! scale factor for alphas scale 00091 * 00092 *'IGLU' 1 0 1101 ! (D=1010)Unintegrated gluon density 00093 * ! 1: CCFM old set JS2001 00094 * ! 1001: CCFM J2003 set 1 00095 * ! 1002: CCFM J2003 set 2 00096 * ! 1003: CCFM J2003 set 3 00097 * ! 1010: CCFM set A0 00098 * ! 1011: CCFM set A0+ 00099 * ! 1012: CCFM set A0- 00100 * ! 1013: CCFM set A1 00101 * ! 1020: CCFM set B0 00102 * ! 1021: CCFM set B0+ 00103 * ! 1022: CCFM set B0- 00104 * ! 1023: CCFM set B1 00105 * ! 1101: CCFM set C 00106 * ! 2: derivative of collinear gluon (GRV) 00107 * ! 3: Bluemlein 00108 * ! 4: KMS 00109 * ! 5: GBW (saturation model) 00110 * ! 6: KMR 00111 * ! 7: Ryskin,Shabelski 00112 * 00113 * ++++++++++++ BASES/SPRING Integration procedure ++++++++++++ 00114 * 00115 'NCAL' 1 0 50000 ! (D=20000) Nr of calls per iteration for bases 00116 * 00117 'ACC1' 1 0 1.0 ! (D=1) relative prec.(%) for grid optimisation 00118 * 00119 'ACC2' 1 0 0.5 ! (0.5) relative prec.(%) for integration 00120 * 00121 * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 00122 * 00123 *'INTE' 1 0 0 ! Interaction type (D=0) 00124 * ! = 0 electromagnetic interaction 00125 *'KT1 ' 1 0 0.44 ! (D=0.0) intrinsic kt for beam 1 00126 * 00127 *'KT2 ' 1 0 0.44 ! (D=0.0) intrinsic kt for beam 2 00128 * 00129 *'KTRE' 1 0 0.35 ! (D=0.35) primordial kt when non-trivial 00130 * ! target remnant is split into two particles 00131 * Les Houches Accord Interface 00132 *'ILHA' 1 0 10 ! (D=10) Les Houches Accord 00133 * ! = 0 use internal CASCADE 00134 * ! = 1 write event file 00135 * ! = 10 call PYTHIA for final state PS and remnant frag 00136 * 00137 * path for updf files 00138 *'UPDF' '/afs/desy.de/group/alliance/mcg/public/MCGenerators/cascade/2.0.1/data' 00139 *----------------------------------------------------------------------- 00140 GPYT 0 / ! PYTHIA 6 PARAMETERS 00141 *----------------------------------------------------------------------- 00142 * 00143 * 00144 * VAR-NAM 1.INDX 2.INDX NEW-VALUE ! COMMENT IF NEEDED 00145 * ------- ------ ------ -------- --------------------------------- 00146 * 00147 'PMAS' 4 1 1.6 ! charm mass 00148 'PMAS' 5 1 4.75 ! bottom mass 00149 'PMAS' 25 1 125. ! higgs mass 00150 * 00151 'PARU' 112 0 0.2 ! lambda QCD 00152 * 00153 * ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 00154 * 00155 * alphas parameters 00156 'MSTU' 111 0 1 ! = 0 : alpha_s is fixed 00157 * ! at the value PARU(111) 00158 * ! =1 ;first-order running alpha_s 00159 * ! =2 ;second-order running alpha_s 00160 * 00161 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 00162 ** 00163 * ! Type of Fragmentation: 00164 *'MSTJ' 1 0 2 ! (D=1), 1=string, 2=independent 00165 'MSTJ' 41 0 1 ! 00166 * ! see also MSTJ(2) and MSTJ(3) 00167 * angular ordering in timelike cascade 00168 'MSTJ' 48 0 1 ! (D=0), 0=no max. angle, 00169 * ! 1=max angle def. in PARJ(85) 00170 'MSTU' 112 0 4 ! nr of flavours wrt lambda_QCD 00171 'MSTU' 113 0 3 ! min nr of flavours for alphas 00172 'MSTU' 114 0 5 ! max nr of flavours for alphas 00173 * 00174 ************************************************************************ 00175 END$