file analyses/Analysis_CMS_13TeV_Photon_GMSB_36invfb.cpp
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Namespaces
| Name |
|---|
| Gambit TODO: see if we can use this one: |
| Gambit::ColliderBit |
Classes
| Name | |
|---|---|
| class | Gambit::ColliderBit::Analysis_CMS_13TeV_Photon_GMSB_36invfb |
Source code
///
/// \author Yang Zhang
/// \date 2019 Jan
///
/// *********************************************
// Based on http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-16-046/index.html
// Search for gauge-mediated supersymmetry in events with at least one photon and missing transverse momentum in pp collisions at s√= 13 TeV
/*
Note:
Isolation of photons and jets are not performed.
*/
#include <vector>
#include <cmath>
#include <memory>
#include <iomanip>
#include <fstream>
#include "gambit/ColliderBit/analyses/Analysis.hpp"
#include "gambit/ColliderBit/CMSEfficiencies.hpp"
#include "gambit/ColliderBit/mt2_bisect.h"
#include "gambit/ColliderBit/analyses/Cutflow.hpp"
// #define CHECK_CUTFLOW
using namespace std;
namespace Gambit {
namespace ColliderBit {
class Analysis_CMS_13TeV_Photon_GMSB_36invfb : public Analysis {
public:
static constexpr const char* detector = "CMS";
// Counters for the number of accepted events for each signal region
std::map<string, EventCounter> _counters = {
{"SR-600-800", EventCounter("SR-600-800")},
{"SR-800-1000", EventCounter("SR-800-1000")},
{"SR-1000-1300", EventCounter("SR-1000-1300")},
{"SR-1300", EventCounter("SR-1300")},
};
Cutflow _cutflow;
Analysis_CMS_13TeV_Photon_GMSB_36invfb():
_cutflow("CMS 1-photon GMSB 13 TeV", {"preselection", "MET>300GeV", "MT(g,MET)>300GeV", "S_T^g>600GeV"})
{
set_analysis_name("CMS_13TeV_Photon_GMSB_36invfb");
set_luminosity(35.9);
}
void run(const HEPUtils::Event* event)
{
// Baseline objects
HEPUtils::P4 ptot = event->missingmom();
double met = event->met();
_cutflow.fillinit();
// Apply photon efficiency and collect baseline photon
//@note Numbers digitized from https://twiki.cern.ch/twiki/pub/CMSPublic/SUSMoriond2017ObjectsEfficiency/PhotonEfficiencies_ForPublic_Moriond2017_LoosePixelVeto.pdf
//@note The efficiency map has been extended to cover the low-pT region, using the efficiencies from BuckFast (CMSEfficiencies.hpp)
const vector<double> aPhoton={0., 0.8, 1.4442, 1.566, 2.0, 2.5, DBL_MAX}; // Bin edges in eta
const vector<double> bPhoton={0., 20., 35., 50., 90., DBL_MAX}; // Bin edges in pT. Assume flat efficiency above 200, where the CMS map stops.
const vector<double> cPhoton={
// pT: (0,20), (20,35), (35,50), (50,90), (90,inf)
0.0, 0.735, 0.779, 0.805, 0.848, // eta: (0, 0.8)
0.0, 0.726, 0.746, 0.768, 0.809, // eta: (0.8, 1.4442)
0.0, 0.0, 0.0, 0.0, 0.0, // eta: (1.4442, 1.566)
0.0, 0.669, 0.687, 0.704, 0.723, // eta: (1.566, 2.0)
0.0, 0.564, 0.585, 0.592, 0.612, // eta: (2.0, 2.5)
0.0, 0.0, 0.0, 0.0, 0.0, // eta > 2.5
};
HEPUtils::BinnedFn2D<double> _eff2dPhoton(aPhoton,bPhoton,cPhoton);
vector<const HEPUtils::Particle*> Photons;
for (const HEPUtils::Particle* photon : event->photons())
{
bool isPhoton=has_tag(_eff2dPhoton, photon->abseta(), photon->pT());
if (isPhoton && photon->pT()>15.) Photons.push_back(photon);
}
// jets
vector<const HEPUtils::Jet*> Jets;
for (const HEPUtils::Jet* jet : event->jets("antikt_R04"))
{
if (jet->pT()>30. &&fabs(jet->eta())<3.0) Jets.push_back(jet);
}
// TODO: Apply jets isolation instead of removeOverlap.
removeOverlap(Jets, Photons, 0.2);
// Preselection
bool high_pT_photon = false; // At least one high-pT photon;
bool delta_R_g_j = false; // Photons are required to have delta_R>0.5 to the nearest jet;
bool delta_phi_j_MET = false; // Jets with pT>100 GeV must fulfill delta_phi(MET,jet)>0.3;
for (const HEPUtils::Particle* photon : Photons){
if (photon->pT()>180. && fabs(photon->eta()) < 1.44) {
high_pT_photon = true;
for (const HEPUtils::Jet* jet : Jets){
if ( jet->mom().deltaR_eta(photon->mom()) < 0.5 ) delta_R_g_j=true;
}
}
}
if (not high_pT_photon) return;
if (delta_R_g_j) return;
for (const HEPUtils::Jet* jet : Jets){
if (jet->pT()>100. && jet->mom().deltaPhi(ptot) < 0.3 ) delta_phi_j_MET=true;
}
if (delta_phi_j_MET) return;
_cutflow.fill(1);
// MET > 300 GeV
if (met<300)return;
_cutflow.fill(2);
// MT(photon,MET) > 300 GeV
double MT = sqrt(2.*Photons[0]->pT()*met*(1. - std::cos(Photons[0]->mom().deltaPhi(ptot)) ));
if (MT<300)return;
_cutflow.fill(3);
// S_T^gamma > 600 GeV
double STgamma = met;
for (const HEPUtils::Particle* photon : Photons){
STgamma += photon->pT();
}
if (STgamma<600) return;
_cutflow.fill(4);
// Signal regions
if (STgamma<800) _counters.at("SR-600-800").add_event(event);
else if (STgamma<1000) _counters.at("SR-800-1000").add_event(event);
else if (STgamma<1300) _counters.at("SR-1000-1300").add_event(event);
else _counters.at("SR-1300").add_event(event);
}
/// Combine the variables of another copy of this analysis (typically on another thread) into this one.
void combine(const Analysis* other)
{
const Analysis_CMS_13TeV_Photon_GMSB_36invfb* specificOther
= dynamic_cast<const Analysis_CMS_13TeV_Photon_GMSB_36invfb*>(other);
for (auto& pair : _counters) { pair.second += specificOther->_counters.at(pair.first); }
}
virtual void collect_results()
{
#ifdef CHECK_CUTFLOW
cout << _cutflow << endl;
// Note: The EventCount::sum() call below gives the raw MC event count.
// Use weight_sum() to get the sum of event weights.
for (auto& pair : _counters) {
cout << pair.first << "\t" << pair.second.sum() << endl;
}
#endif
add_result(SignalRegionData(_counters.at("SR-600-800") , 281., {267, 27.2}));
add_result(SignalRegionData(_counters.at("SR-800-1000") , 101., {100.2,10.8}));
add_result(SignalRegionData(_counters.at("SR-1000-1300"), 65., {52.8, 6.16}));
add_result(SignalRegionData(_counters.at("SR-1300") , 24., {17.6, 2.76}));
}
protected:
void analysis_specific_reset() {
for (auto& pair : _counters) { pair.second.reset(); }
}
};
// Factory fn
DEFINE_ANALYSIS_FACTORY(CMS_13TeV_Photon_GMSB_36invfb)
}
}
Updated on 2024-07-18 at 13:53:35 +0000