Merge pull request #1655 from sdifalco/cellfix

initialize electron mass

Author: brownd1978

EventGenerator/src/LeadingLog_module.cc

@@ -26,6 +26,7 @@
 
 #include "Offline/SeedService/inc/SeedService.hh"
 #include "Offline/GlobalConstantsService/inc/GlobalConstantsHandle.hh"
+#include "Offline/GlobalConstantsService/inc/ParticleDataList.hh"
 #include "Offline/GlobalConstantsService/inc/PhysicsParams.hh"
 #include "Offline/DataProducts/inc/PDGCode.hh"
 #include "Offline/MCDataProducts/inc/StageParticle.hh"
@@ -63,6 +64,8 @@ namespace mu2e {
     void addParticles(StageParticleCollection* output, art::Ptr<SimParticle> mustop, double time);
     //----------------------------------------------------------------
   private:
+    const PDGCode::type electronId_ = PDGCode::e_minus; // for mass only
+
     double muonLifeTime_;
     art::ProductToken<SimParticleCollection> const simsToken_;
     unsigned verbosity_;
@@ -90,8 +93,8 @@ namespace mu2e {
     , eng_{createEngine(art::ServiceHandle<SeedService>()->getSeed())}
     , randExp_{eng_}
     , pdgId_(conf().pdgId())
+    ,_mass(GlobalConstantsHandle<ParticleDataList>()->particle(electronId_).mass())
     , spectrum_(BinnedSpectrum(conf().spectrum.get<fhicl::ParameterSet>()))
-
   {
     produces<mu2e::StageParticleCollection>();
     pid_ = static_cast<PDGCode::type>(pdgId_);
@@ -140,7 +143,6 @@ namespace mu2e {
     CLHEP::Hep3Vector p3 = randomUnitSphere_->fire(p);
     CLHEP::HepLorentzVector fourmom(p3, energy);
 
-
     output->emplace_back(mustop,
                        process_,
                        pid_,