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134 | // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
#include "Rivet/Projections/DecayedParticles.hh"
namespace Rivet {
/// @brief B -> K* l+ l-
class BELLE_2019_I1728173 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(BELLE_2019_I1728173);
/// @name Analysis methods
/// @{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
UnstableParticles ufs = UnstableParticles(Cuts::abspid==511 or
Cuts::abspid==521);
declare(ufs, "UFS");
DecayedParticles BB(ufs);
BB.addStable( 443);
BB.addStable(100443);
BB.addStable( 313);
BB.addStable( 323);
BB.addStable(-313);
BB.addStable(-323);
declare(BB, "BB");
// book histograms
for(unsigned int ix=0;ix<4;++ix)
for(unsigned int iy=0;iy<3;++iy) {
book(_h_br[ix][iy],"TMP/h_br_"+toString(ix+1)+"_"+toString(iy+1),refData(1,1+iy,1));
}
for(unsigned int ix=0;ix<2;++ix)
book(_c[ix],"TMP/nB_"+toString(ix+1));
}
/// Perform the per-event analysis
void analyze(const Event& event) {
static const map<PdgId,unsigned int> & mode1 = { { 323,1},{ 13,1}, {-13,1}};
static const map<PdgId,unsigned int> & mode1CC = { {-323,1},{ 13,1}, {-13,1}};
static const map<PdgId,unsigned int> & mode2 = { { 313,1},{ 13,1}, {-13,1}};
static const map<PdgId,unsigned int> & mode2CC = { {-313,1},{ 13,1}, {-13,1}};
static const map<PdgId,unsigned int> & mode3 = { { 323,1},{ 11,1}, {-11,1}};
static const map<PdgId,unsigned int> & mode3CC = { {-323,1},{ 11,1}, {-11,1}};
static const map<PdgId,unsigned int> & mode4 = { { 313,1},{ 11,1}, {-11,1}};
static const map<PdgId,unsigned int> & mode4CC = { {-313,1},{ 11,1}, {-11,1}};
DecayedParticles BB = apply<DecayedParticles>(event, "BB");
// loop over particles
for(unsigned int ix=0;ix<BB.decaying().size();++ix) {
if(BB.decaying()[ix].abspid()==521) _c[0]->fill();
else _c[1]->fill();
int imode=0;
if ((BB.decaying()[ix].pid()>0 && BB.modeMatches(ix,3,mode1)) ||
(BB.decaying()[ix].pid()<0 && BB.modeMatches(ix,3,mode1CC))) imode=0;
else if ((BB.decaying()[ix].pid()>0 && BB.modeMatches(ix,3,mode2)) ||
(BB.decaying()[ix].pid()<0 && BB.modeMatches(ix,3,mode2CC))) imode=1;
else if ((BB.decaying()[ix].pid()>0 && BB.modeMatches(ix,3,mode3)) ||
(BB.decaying()[ix].pid()<0 && BB.modeMatches(ix,3,mode3CC))) imode=2;
else if ((BB.decaying()[ix].pid()>0 && BB.modeMatches(ix,3,mode4)) ||
(BB.decaying()[ix].pid()<0 && BB.modeMatches(ix,3,mode4CC))) imode=3;
else continue;
int il = imode<2 ? 13 : 11;
const Particle & lp = BB.decayProducts()[ix].at(-il)[0];
const Particle & lm = BB.decayProducts()[ix].at( il)[0];
double qq = (lp.momentum()+lm.momentum()).mass2();
for(unsigned int iy=0;iy<3;++iy) {
_h_br[imode][iy]->fill(qq);
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
// ratio of lifetimes
double rLife = 1.078;
// normalize BR plots
for(unsigned int ix=0;ix<4;++ix) {
for(unsigned int iy=0;iy<3;++iy) {
if(ix%2==0) {
scale(_h_br[ix][iy],1e7/ *_c[0]);
}
else {
scale(_h_br[ix][iy],1e7*rLife/ *_c[1]);
}
}
}
// RK*
for(unsigned int ix=0;ix<3;++ix) {
Scatter2DPtr RK;
book(RK,1,1+ix,3);
divide(_h_br[0][ix],_h_br[2][ix],RK);
book(RK,1,1+ix,2);
divide(_h_br[1][ix],_h_br[3][ix],RK);
book(RK,1,1+ix,1);
for(unsigned int ibin=0;ibin<_h_br[1][ix]->bins().size();++ibin) {
double num = _h_br[0][ix]->bins()[ibin].height() +_h_br[1][ix]->bins()[ibin].height();
double numErr2 = sqr(_h_br[0][ix]->bins()[ibin].heightErr())+sqr(_h_br[1][ix]->bins()[ibin].heightErr());
double den = _h_br[2][ix]->bins()[ibin].height() +_h_br[3][ix]->bins()[ibin].height();
double denErr2 = sqr(_h_br[2][ix]->bins()[ibin].heightErr())+sqr(_h_br[3][ix]->bins()[ibin].heightErr());
double val(0.),err(0.);
if(num>0. && den>0.) {
val = num/den;
err = val*(numErr2/sqr(num)+denErr2/sqr(den));
}
double dx = 0.5*_h_br[0][ix]->bins()[ibin].xWidth();
RK->addPoint(_h_br[0][ix]->bins()[ibin].xMid(),val,
make_pair(dx,dx),make_pair(err,err));
}
}
}
/// @}
/// @name Histograms
/// @{
CounterPtr _c[2];
Histo1DPtr _h_br[4][3];
/// @}
};
RIVET_DECLARE_PLUGIN(BELLE_2019_I1728173);
}
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