benchmarks/barrel_ecal: remove unused emcal_barrel_electrons (covered by emcal_barrel_particles)

benchmarks/barrel_ecal/scripts/emcal_barrel_electrons.cxx

-//////////////////////////////////////////////////////////////
-// EMCAL Barrel detector
-// Single Electron dataset
-// J.KIM 04/02/2021
-//////////////////////////////////////////////////////////////
-#include "HepMC3/GenEvent.h"
-#include "HepMC3/Print.h"
-#include "HepMC3/ReaderAscii.h"
-#include "HepMC3/WriterAscii.h"
-
-#include <cmath>
-#include <iostream>
-#include <math.h>
-#include <random>
-
-#include "TMath.h"
-#include "TRandom.h"
-
-using namespace HepMC3;
-
-void emcal_barrel_electrons(int n_events = 1e6, double e_start = 0.0, double e_end = 30.0, const char* out_fname = "./data/emcal_barrel_electrons.hepmc") {
-  WriterAscii hepmc_output(out_fname);
-  int events_parsed = 0;
-  GenEvent evt(Units::GEV, Units::MM);
-
-  // Random number generator
-  TRandom* r1 = new TRandom();
-
-  // Constraining the solid angle, but larger than that subtended by the
-  // detector
-  // https://indico.bnl.gov/event/7449/contributions/35966/attachments/27177/41430/EIC-DWG-Calo-03192020.pdf
-  // See a figure on slide 26
-  double cos_theta_min = std::cos(M_PI * (45.0 / 180.0));
-  double cos_theta_max = std::cos(M_PI * (135.0 / 180.0));
-
-  for (events_parsed = 0; events_parsed < n_events; events_parsed++) {
-    // FourVector(px,py,pz,e,pdgid,status)
-    // type 4 is beam
-    // pdgid 11 - electron
-    // pdgid 111 - pi0
-    // pdgid 2212 - proton
-    GenParticlePtr p1 = std::make_shared<GenParticle>(FourVector(0.0, 0.0, 10.0, 10.0), 11, 4);
-    GenParticlePtr p2 = std::make_shared<GenParticle>(FourVector(0.0, 0.0, 0.0, 0.938), 2212, 4);
-
-    // Define momentum
-    Double_t p        = r1->Uniform(e_start, e_end);
-    Double_t phi      = r1->Uniform(0.0, 2.0 * M_PI);
-    Double_t costheta = r1->Uniform(cos_theta_min, cos_theta_max);
-    Double_t theta    = std::acos(costheta);
-    Double_t px       = p * std::cos(phi) * std::sin(theta);
-    Double_t py       = p * std::sin(phi) * std::sin(theta);
-    Double_t pz       = p * std::cos(theta);
-
-    // Generates random vectors, uniformly distributed over the surface of a
-    // sphere of given radius, in this case momentum.
-    // r1->Sphere(px, py, pz, p);
-
-    // type 1 is final state
-    // pdgid 11 - electron 0.510 MeV/c^2
-    GenParticlePtr p3 = std::make_shared<GenParticle>(FourVector(px, py, pz, sqrt(p * p + (0.000511 * 0.000511))), 11, 1);
-
-    GenVertexPtr v1 = std::make_shared<GenVertex>();
-    v1->add_particle_in(p1);
-    v1->add_particle_in(p2);
-
-    v1->add_particle_out(p3);
-    evt.add_vertex(v1);
-
-    if (events_parsed == 0) {
-      std::cout << "First event: " << std::endl;
-      Print::listing(evt);
-    }
-
-    hepmc_output.write_event(evt);
-    if (events_parsed % 10000 == 0) {
-      std::cout << "Event: " << events_parsed << std::endl;
-    }
-    evt.clear();
-  }
-  hepmc_output.close();
-  std::cout << "Events parsed and written: " << events_parsed << std::endl;
-}
-