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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/GammaGammaFinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief mu+mu- and tau+tau- in gamma gamma
class L3_2004_I645127 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(L3_2004_I645127);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// get the mode and options
_mode =0;
if( getOption("PROCESS") == "EE" ) _mode = 0;
else if( getOption("PROCESS") == "GG") _mode = 1;
// Initialise and register projections
if(_mode==0) {
const GammaGammaKinematics& diskin = declare(GammaGammaKinematics(), "Kinematics");
declare(GammaGammaFinalState(diskin), "FS");
declare(UnstableParticles(),"UFS");
}
else if(_mode==1) {
declare(FinalState(), "FS");
}
// Book counters
book(_c_sigma_mu1, "/TMP/sigma_mu_1");
book(_c_sigma_mu2, "/TMP/sigma_mu_2");
book(_c_sigma_tau, "/TMP/sigma_tau");
}
void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
for(const Particle &child : p.children()) {
if(child.children().empty()) {
--nRes[child.pid()];
--ncount;
}
else
findChildren(child,nRes,ncount);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// stuff for e+e- collisions
double W2 = sqr(sqrtS());
if(_mode==0) {
const GammaGammaKinematics& kin = apply<GammaGammaKinematics>(event, "Kinematics");
W2 = kin.W2();
if(W2<9.*sqr(GeV) ) vetoEvent;
}
const FinalState& fs = apply<FinalState>(event, "FS");
map<long,int> nCount;
int ntotal(0);
bool fiducal = true;
for(const Particle & p : fs.particles()) {
nCount[p.pid()] += 1;
++ntotal;
if(abs(p.pid())==13) {
if(abs(cos(p.momentum().polarAngle()))>0.8) fiducal = false;
}
}
if( nCount[-13]==1 && nCount[13]==1 && ntotal==2+nCount[22]) {
if(W2<1600.*sqr(GeV)) {
_c_sigma_mu1->fill();
if(fiducal) {
_c_sigma_mu2->fill();
}
}
}
if(_mode==1) return;
bool foundTauPlus = false, foundTauMinus = true;
const UnstableParticles & ufs = apply<UnstableParticles>(event, "UFS");
for (const Particle& p : ufs.particles()) {
if(p.children().empty()) continue;
// find the taus
if(abs(p.pid())==15) {
if(p.pid()== 15) foundTauMinus=true;
if(p.pid()==-15) foundTauPlus =true;
findChildren(p,nCount,ntotal);
}
}
if(!foundTauPlus || !foundTauMinus)
vetoEvent;
bool matched = true;
for(auto const & val : nCount) {
if(val.first==22) {
continue;
}
else if(val.second!=0) {
matched = false;
break;
}
}
if(matched)
_c_sigma_tau->fill();
}
/// Normalise histograms etc., after the run
void finalize() {
// prefactor for the cross sections
double fact = crossSection()/picobarn/sumOfWeights();
if(_mode==1) fact /= 1000.;
scale(_c_sigma_mu1,fact);
scale(_c_sigma_mu2,fact);
scale(_c_sigma_tau,fact);
unsigned int imin=0, imax = 3;
if(_mode==1) {
imin=3;
imax=4;
}
for(unsigned int ihist=imin;ihist<imax;++ihist) {
unsigned int id=0, iy=0;
double sigma = 0., error = 0.;
if(ihist==0) {
id=1;
iy=1;
sigma = _c_sigma_mu2->val();
error = _c_sigma_mu2->err();
}
else if(ihist==1) {
id=1;
iy=2;
sigma = _c_sigma_mu1->val();
error = _c_sigma_mu1->err();
}
else if(ihist==2) {
id=2;
iy=1;
sigma = _c_sigma_tau->val();
error = _c_sigma_tau->err();
}
else if(ihist==3) {
id=3;
iy=5;
sigma = _c_sigma_mu1->val();
error = _c_sigma_mu1->err();
}
Scatter2D temphisto(refData(id, 1, iy));
Scatter2DPtr mult;
book(mult, id, 1, iy);
for (size_t b = 0; b < temphisto.numPoints(); b++) {
const double x = temphisto.point(b).x();
pair<double,double> ex = temphisto.point(b).xErrs();
pair<double,double> ex2 = ex;
if(ex2.first ==0.) ex2. first=0.0001;
if(ex2.second==0.) ex2.second=0.0001;
if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) {
mult->addPoint(x, sigma, ex, make_pair(error,error));
}
else {
mult->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
}
//@}
/// @name Histograms
//@{
CounterPtr _c_sigma_mu1,_c_sigma_mu2,_c_sigma_tau;
unsigned int _mode;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(L3_2004_I645127);
}
|