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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Charm meson spectra in bottom decays
class BABAR_2006_I719111 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(BABAR_2006_I719111);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(UnstableParticles(), "UFS");
// Book histograms
book(_h_Bm_D0 , 1, 1, 1);
book(_h_Bm_Dbar0 , 1, 1, 2);
book(_h_Bm_Dp , 2, 1, 1);
book(_h_Bm_Dm , 2, 1, 2);
book(_h_Bm_Dsp , 3, 1, 1);
book(_h_Bm_Dsm , 3, 1, 2);
book(_h_Bm_lam , 4, 1, 1);
book(_h_Bm_lbar , 4, 1, 2);
book(_h_Bbar0_D0 , 5, 1, 1);
book(_h_Bbar0_Dbar0, 5, 1, 2);
book(_h_Bbar0_Dp , 6, 1, 1);
book(_h_Bbar0_Dm , 6, 1, 2);
book(_h_Bbar0_Dsp , 7, 1, 1);
book(_h_Bbar0_Dsm , 7, 1, 2);
book(_h_Bbar0_lam , 8, 1, 1);
book(_h_Bbar0_lbar , 8, 1, 2);
book(_c_Bm ,"/TMP/Bm");
book(_c_Bbar0,"/TMP/B0");
}
void findDecayProducts(Particle p,
Particles & D0, Particles & Dbar0,
Particles & Dp, Particles & Dm,
Particles & Dsp, Particles & Dsm,
Particles & lam, Particles & lbar) {
for(const Particle & child : p.children()) {
if(child.pid()==421)
D0.push_back(child);
else if(child.pid()==-421)
Dbar0.push_back(child);
else if(child.pid()==411)
Dp.push_back(child);
else if(child.pid()==-411)
Dm.push_back(child);
else if(child.pid()==431)
Dsp.push_back(child);
else if(child.pid()==-431)
Dsm.push_back(child);
else if(child.pid()==4122)
lam.push_back(child);
else if(child.pid()==-4122)
lbar.push_back(child);
else if(!child.children().empty())
findDecayProducts(child,D0,Dbar0,Dp,Dm, Dsp, Dsm, lam, lbar);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for(const Particle & p : ufs.particles(Cuts::abspid==511 || Cuts::abspid==521)) {
if(p.abspid()==511)
_c_Bbar0->fill();
else if(p.abspid()==521)
_c_Bm ->fill();
Particles D0, Dbar0, Dp, Dm, Dsp, Dsm, lam, lbar;
findDecayProducts(p,D0,Dbar0,Dp,Dm, Dsp, Dsm, lam, lbar);
LorentzTransform boost =
LorentzTransform::mkFrameTransformFromBeta(p.momentum().betaVec());
if(p.pid()>0) {
swap(D0, Dbar0);
swap(Dp, Dm);
swap(Dsp, Dsm);
swap(lam, lbar);
}
for(const Particle & child : D0) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_D0 ->fill(pChild);
else
_h_Bbar0_D0->fill(pChild);
}
for(const Particle & child : Dbar0) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_Dbar0 ->fill(pChild);
else
_h_Bbar0_Dbar0->fill(pChild);
}
for(const Particle & child : Dp) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_Dp ->fill(pChild);
else
_h_Bbar0_Dp->fill(pChild);
}
for(const Particle & child : Dm) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_Dm ->fill(pChild);
else
_h_Bbar0_Dm->fill(pChild);
}
for(const Particle & child : Dsp) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_Dsp ->fill(pChild);
else
_h_Bbar0_Dsp->fill(pChild);
}
for(const Particle & child : Dsm) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_Dsm ->fill(pChild);
else
_h_Bbar0_Dsm->fill(pChild);
}
for(const Particle & child : lam) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_lam ->fill(pChild);
else
_h_Bbar0_lam->fill(pChild);
}
for(const Particle & child : lbar) {
double pChild = boost.transform(child.momentum()).p3().mod();
if(p.abspid()==521)
_h_Bm_lbar ->fill(pChild);
else
_h_Bbar0_lbar->fill(pChild);
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_Bm_D0 ,100./ _c_Bm->val());
scale(_h_Bm_Dbar0 ,100./ _c_Bm->val());
scale(_h_Bm_Dp ,100./ _c_Bm->val());
scale(_h_Bm_Dm ,100./ _c_Bm->val());
scale(_h_Bm_Dsp ,100./ _c_Bm->val());
scale(_h_Bm_Dsm ,100./ _c_Bm->val());
scale(_h_Bm_lam ,100./ _c_Bm->val());
scale(_h_Bm_lbar ,100./ _c_Bm->val());
scale(_h_Bbar0_D0 ,100./ _c_Bbar0->val());
scale(_h_Bbar0_Dbar0,100./ _c_Bbar0->val());
scale(_h_Bbar0_Dp ,100./ _c_Bbar0->val());
scale(_h_Bbar0_Dm ,100./ _c_Bbar0->val());
scale(_h_Bbar0_Dsp ,100./ _c_Bbar0->val());
scale(_h_Bbar0_Dsm ,100./ _c_Bbar0->val());
scale(_h_Bbar0_lam ,100./ _c_Bbar0->val());
scale(_h_Bbar0_lbar ,100./ _c_Bbar0->val());
}
//@}
/// @name Histograms
//@{
Histo1DPtr _h_Bm_D0,_h_Bm_Dbar0,_h_Bm_Dp,_h_Bm_Dm,_h_Bm_Dsp,_h_Bm_Dsm,
_h_Bm_lam,_h_Bm_lbar,_h_Bbar0_D0;
Histo1DPtr _h_Bbar0_Dbar0,_h_Bbar0_Dp,_h_Bbar0_Dm,
_h_Bbar0_Dsp,_h_Bbar0_Dsm,_h_Bbar0_lam,_h_Bbar0_lbar;
CounterPtr _c_Bm ,_c_Bbar0;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(BABAR_2006_I719111);
}
|