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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Add a short analysis description here
class BELLE_2013_I1238273 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(BELLE_2013_I1238273);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(UnstableParticles(), "UFS");
// Book histograms
book(_h_q2_B0bar_pi ,1, 1, 1);
book(_h_q2_B0bar_rho ,3, 1, 1);
book(_h_q2_Bminus_pi ,2, 1, 1);
book(_h_q2_Bminus_rho ,4, 1, 1);
book(_h_q2_Bminus_omega ,5, 1, 1);
}
// Calculate the Q2 using mother and daugher meson
double q2(const Particle& B, int mesonID) {
FourMomentum q = B.mom() - filter_select(B.children(), Cuts::pid==mesonID)[0];
return q*q;
}
// Check for explicit decay into pdgids
bool isSemileptonicDecay(const Particle& mother, vector<int> ids) {
// Trivial check to ignore any other decays but the one in question modulo photons
const Particles children = mother.children(Cuts::pid!=PID::PHOTON);
if (children.size()!=ids.size()) return false;
// Check for the explicit decay
return all(ids, [&](int i){return count(children, hasPID(i))==1;});
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Loop over B0bar Mesons
for(const Particle& p : apply<UnstableParticles>(event, "UFS").particles(Cuts::pid==PID::B0BAR)) {
if (isSemileptonicDecay(p, {PID::PIPLUS, PID::ELECTRON, PID::NU_EBAR}) ||
isSemileptonicDecay(p, {PID::PIPLUS, PID::MUON, PID::NU_MUBAR})) {
_h_q2_B0bar_pi->fill(q2(p, PID::PIPLUS));
}
if (isSemileptonicDecay(p, {PID::RHOPLUS, PID::ELECTRON, PID::NU_EBAR}) ||
isSemileptonicDecay(p, {PID::RHOPLUS, PID::MUON, PID::NU_MUBAR})) {
_h_q2_B0bar_rho->fill(q2(p, PID::RHOPLUS));
}
}
// Loop over B- Mesons
for(const Particle& p : apply<UnstableParticles>(event, "UFS").particles(Cuts::pid==PID::BMINUS)) {
if (isSemileptonicDecay(p, {PID::PI0, PID::ELECTRON, PID::NU_EBAR}) ||
isSemileptonicDecay(p, {PID::PI0, PID::MUON, PID::NU_MUBAR})) {
_h_q2_Bminus_pi->fill(q2(p, PID::PI0));
}
if (isSemileptonicDecay(p, {PID::RHO0, PID::ELECTRON, PID::NU_EBAR}) ||
isSemileptonicDecay(p, {PID::RHO0, PID::MUON, PID::NU_MUBAR})) {
_h_q2_Bminus_rho->fill(q2(p,PID::RHO0));
}
if (isSemileptonicDecay(p, {PID::OMEGA, PID::ELECTRON, PID::NU_EBAR}) ||
isSemileptonicDecay(p, {PID::OMEGA, PID::MUON, PID::NU_MUBAR})) {
_h_q2_Bminus_omega->fill(q2(p, PID::OMEGA));
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
normalize(_h_q2_B0bar_pi , 298.8); // normalize to BF*dQ2
normalize(_h_q2_B0bar_rho , 1304.8); // normalize to BF*dQ2
normalize(_h_q2_Bminus_pi , 324.8); // normalize to BF*dQ2
normalize(_h_q2_Bminus_rho , 367.0); // normalize to BF*dQ2
normalize(_h_q2_Bminus_omega, 793.1); // normalize to BF*dQ2
}
//@}
private:
/// @name Histograms
//@{
Histo1DPtr _h_q2_B0bar_pi ;
Histo1DPtr _h_q2_B0bar_rho ;
Histo1DPtr _h_q2_Bminus_pi ;
Histo1DPtr _h_q2_Bminus_rho ;
Histo1DPtr _h_q2_Bminus_omega;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(BELLE_2013_I1238273);
}
|