Fork me on GitHub

Changeset ea0f50d in git


Ignore:
Timestamp:
Aug 23, 2016, 5:39:52 PM (8 years ago)
Author:
Pavel Demin <pavel.demin@…>
Branches:
ImprovedOutputFile, Timing, dual_readout, llp, master
Children:
7bb13cd
Parents:
7b48085
Message:

switch to uniform eta and pt for particle gun in DelphesPythia8

Files:
2 edited

Legend:

Unmodified
Added
Removed
  • examples/Pythia8/configParticleGun.cmnd

    r7b48085 rea0f50d  
    33! 1) Settings used in the main program.
    44
    5 Main:numberOfEvents = 10000         ! number of events to generate
     5Main:numberOfEvents = 10000        ! number of events to generate
    66Main:timesAllowErrors = 3          ! how many aborts before run stops
    7 Main:spareFlag1 = on                ! true means particle gun
    8 Main:spareMode1 = ID               ! 1-5 - di-quark, 21 - di-gluon, 11 - single electron, 13 - single muon, 22 - single photon
    9 Main:spareParm1 = 10000           ! max pt
     7Main:spareFlag1 = on               ! true means particle gun
     8Main:spareMode1 = ID               ! 1-5 - di-quark, 21 - di-gluon, 11 - single electron, 13 - single muon, 15 - single tau, 22 - single photon
     9Main:spareParm1 = 10000            ! max pt
     10Main:spareParm2 = 2.5              ! max eta
    1011
    1112! 2) Settings related to output in init(), next() and stat().
  • readers/DelphesPythia8.cpp

    r7b48085 rea0f50d  
    153153// from pythia8 example 21
    154154
    155 void fillParticle(int id, double ee_max, double thetaIn, double phiIn,
    156   Pythia8::Event& event, Pythia8::ParticleData& pdt, Pythia8::Rndm& rndm, bool atRest = false) {
    157 
     155void fillParticle(int id, double pt_max, double eta_max,
     156  Pythia8::Event &event, Pythia8::ParticleData &pdt, Pythia8::Rndm &rndm)
     157{
    158158  // Reset event record to allow for new event.
    159159  event.reset();
    160160
    161   // Angles uniform in solid angle.
    162   double cThe, sThe, phi, ee;
    163   cThe = 2. * rndm.flat() - 1.;
    164   sThe = Pythia8::sqrtpos(1. - cThe * cThe);
    165   phi = 2. * M_PI * rndm.flat();
    166   ee = pow(10,1+(log10(ee_max)-1)*rndm.flat());
    167   double mm = pdt.mSel(id);
    168   double pp = Pythia8::sqrtpos(ee*ee - mm*mm);
     161  // Generate uniform pt and eta.
     162  double pt, eta, phi, pp, ee, mm;
     163  pt = pow(10, 1.0 + (log10(pt_max) - 1.0) * rndm.flat());
     164  eta = (2.0 * rndm.flat() - 1.0) * eta_max;
     165  phi = 2.0 * M_PI * rndm.flat();
     166  pp = pt * cosh(eta);
     167  mm = pdt.mSel(id);
     168  ee = Pythia8::sqrtpos(pp*pp + mm*mm);
    169169
    170170  // Store the particle in the event record.
    171   event.append( id, 1, 0, 0, pp * sThe * cos(phi), pp * sThe * sin(phi), pp * cThe, ee, mm);
    172 
     171  event.append(id, 1, 0, 0, pt * cos(phi), pt * sin(phi), pt * sinh(eta), ee, mm);
    173172}
    174173
    175 void fillPartons(int type, double ee_max, Pythia8::Event& event, Pythia8::ParticleData& pdt,
    176   Pythia8::Rndm& rndm) {
     174void fillPartons(int id, double pt_max, double eta_max,
     175  Pythia8::Event &event, Pythia8::ParticleData &pdt, Pythia8::Rndm &rndm)
     176{
    177177
    178178  // Reset event record to allow for new event.
    179179  event.reset();
    180180
    181   // Angles uniform in solid angle.
    182   double cThe, sThe, phi, ee;
    183 
    184181  // Information on a q qbar system, to be hadronized.
    185182
    186   cThe = 2. * rndm.flat() - 1.;
    187   sThe = Pythia8::sqrtpos(1. - cThe * cThe);
    188   phi = 2. * M_PI * rndm.flat();
    189   ee = pow(10,1+(log10(ee_max)-1)*rndm.flat());
    190   double mm = pdt.m0(type);
    191   double pp = Pythia8::sqrtpos(ee*ee - mm*mm);
    192   if (type == 21)
    193   {
    194     event.append( 21, 23, 101, 102, pp * sThe * cos(phi), pp * sThe * sin(phi), pp * cThe, ee);
    195     event.append( 21, 23, 102, 101, -pp * sThe * cos(phi), -pp * sThe * sin(phi), -pp * cThe, ee);
     183  // Generate uniform pt and eta.
     184  double pt, eta, phi, pp, ee, mm;
     185  pt = pow(10, 1.0 + (log10(pt_max) - 1.0) * rndm.flat());
     186  eta = (2.0 * rndm.flat() - 1.0) * eta_max;
     187  phi = 2.0 * M_PI * rndm.flat();
     188  pp = pt * cosh(eta);
     189  mm = pdt.m0(id);
     190  ee = Pythia8::sqrtpos(pp*pp + mm*mm);
     191
     192  if(id == 21)
     193  {
     194    event.append(21, 23, 101, 102, pt * cos(phi), pt * sin(phi), pt * sinh(eta), ee);
     195    event.append(21, 23, 102, 101, -pt * cos(phi), -pt * sin(phi), -pt * sinh(eta), ee);
    196196  }
    197197  else
    198198  {
    199     event.append(  type, 23, 101,   0, pp * sThe * cos(phi), pp * sThe * sin(phi), pp * cThe, ee, mm);
    200     event.append( -type, 23,   0, 101, -pp * sThe * cos(phi), -pp * sThe * sin(phi), -pp * cThe, ee, mm);
     199    event.append(id, 23, 101, 0, pt * cos(phi), pt * sin(phi), pt * sinh(eta), ee, mm);
     200    event.append(-id, 23, 0, 101, -pt * cos(phi), -pt * sin(phi), -pt * sinh(eta), ee, mm);
    201201  }
    202202}
     
    340340        if (pythia->mode("Main:spareMode1") == 11 || pythia->mode("Main:spareMode1") == 13 || pythia->mode("Main:spareMode1") == 15 || pythia->mode("Main:spareMode1") == 22)
    341341        {
    342           fillParticle( pythia->mode("Main:spareMode1"), pythia->parm("Main:spareParm1"), -1., 0.,pythia->event, pythia->particleData, pythia->rndm, 0);
     342          fillParticle(pythia->mode("Main:spareMode1"), pythia->parm("Main:spareParm1"), pythia->parm("Main:spareParm2"), pythia->event, pythia->particleData, pythia->rndm);
    343343        }
    344         else fillPartons( pythia->mode("Main:spareMode1"), pythia->parm("Main:spareParm1"), pythia->event, pythia->particleData, pythia->rndm);
     344        else
     345        {
     346          fillPartons(pythia->mode("Main:spareMode1"), pythia->parm("Main:spareParm1"), pythia->parm("Main:spareParm2"), pythia->event, pythia->particleData, pythia->rndm);
     347        }
    345348      }
    346349
Note: See TracChangeset for help on using the changeset viewer.