PPSTools Namespace Reference

Classes
struct	FullBeamInfo
struct	LimitedBeamInfo

Functions
void	Get_t_and_xi (const TLorentzVector *proton, double &t, double &xi, LimitedBeamInfo const &bi)
TLorentzVector	HectorParticle2LorentzVector (H_BeamParticle hp, int)
void	LorentzBoost (H_BeamParticle &h_p, int dir, const std::string &frame, FullBeamInfo const &bi)
void	LorentzBoost (TLorentzVector &p_out, const std::string &frame, FullBeamInfo const &bi)
void	LorentzBoost (HepMC::GenParticle &p_out, const std::string &frame, FullBeamInfo const &bi)
H_BeamParticle	LorentzVector2HectorParticle (TLorentzVector p)

Variables
const double	ProtonMass =CLHEP::proton_mass_c2/GeV
const double	ProtonMassSQ =pow(ProtonMass,2)
const double	urad = 1./1000000.

Function Documentation

void PPSTools::Get_t_and_xi	(	const TLorentzVector *	proton,
		double &	t,
		double &	xi,
		LimitedBeamInfo const &	bi
	)

Definition at line 65 of file PPSUtilities.cc.

References funct::cos(), PPSTools::LimitedBeamInfo::fBeamEnergy, PPSTools::LimitedBeamInfo::fBeamMomentum, Pi, ProtonMassSQ, mathSSE::sqrt(), and theta().

Referenced by CTPPSFastTrackingProducer::FastReco().

                                                                                                        {
    t = 0.;
    xi = -1.;
    if (!proton) return;
    double mom = sqrt((proton->Px())*(proton->Px())+(proton->Py())*(proton->Py())+(proton->Pz())*(proton->Pz()));
    if (mom>bi.fBeamMomentum) mom=bi.fBeamMomentum;
    double energy = proton->E();
    double theta  = (proton->Pz()>0)?proton->Theta():TMath::Pi()-proton->Theta();
    t      = -2.*(ProtonMassSQ-bi.fBeamEnergy*energy+bi.fBeamMomentum*mom*cos(theta));
    xi     = (1.0-energy/bi.fBeamEnergy);
}

TLorentzVector PPSTools::HectorParticle2LorentzVector	(	H_BeamParticle	hp,
		int	direction
	)

Definition at line 6 of file PPSUtilities.cc.

References funct::cos(), funct::pow(), ProtonMassSQ, mathSSE::sqrt(), funct::tan(), theta(), and urad.

Referenced by LorentzVector2HectorParticle(), and HectorTransport::transportProton().

{
     double partP = sqrt(pow(hp.getE(),2)-ProtonMassSQ);
     double theta = sqrt(pow(hp.getTX(),2)+pow(hp.getTY(),2))*urad;
     double pz = partP*cos(theta);
     double px = tan((double)hp.getTX()*urad)*pz;//it is equivalente to PartP*sin(theta)*cos(phi);
     double py = tan((double)hp.getTY()*urad)*pz;//it is equivalente to partP*sin(theta)*sin(phi);
     pz*=direction;
     return TLorentzVector(px,py,pz,hp.getE());
}

void PPSTools::LorentzBoost	(	H_BeamParticle &	h_p,
		int	dir,
		const std::string &	frame,
		FullBeamInfo const &	bi
	)

Referenced by CTPPSFastTrackingProducer::FastReco(), LorentzVector2HectorParticle(), and HectorTransport::transportProton().

void PPSTools::LorentzBoost	(	TLorentzVector &	p_out,
		const std::string &	frame,
		FullBeamInfo const &	bi
	)

void PPSTools::LorentzBoost	(	HepMC::GenParticle &	p_out,
		const std::string &	frame,
		FullBeamInfo const &	bi
	)

H_BeamParticle PPSTools::LorentzVector2HectorParticle

(

TLorentzVector

p

)

Definition at line 17 of file PPSUtilities.cc.

References funct::abs(), pfBoostedDoubleSVAK8TagInfos_cfi::beta, funct::cos(), dir, PPSTools::FullBeamInfo::fBeamEnergy, PPSTools::FullBeamInfo::fBeamMomentum, PPSTools::FullBeamInfo::fCrossingAngleBeam1, PPSTools::FullBeamInfo::fCrossingAngleBeam2, GenParticle::GenParticle, HectorParticle2LorentzVector(), LorentzBoost(), AlCaHLTBitMon_ParallelJobs::p, and funct::sin().

{
     H_BeamParticle h_p;
     h_p.set4Momentum(p.Px(),p.Py(),abs(p.Pz()),p.E());
     return h_p;
}

Variable Documentation

const double PPSTools::ProtonMass =CLHEP::proton_mass_c2/GeV

Definition at line 32 of file PPSUtilities.h.

const double PPSTools::ProtonMassSQ =pow(ProtonMass,2)

Definition at line 33 of file PPSUtilities.h.

Referenced by CTPPSFastTrackingProducer::CTPPSFastTrackingProducer(), CTPPSFastTrackingProducer::FastReco(), HectorTransport::HectorTransport(), and CTPPSFastTrackingProducer::SearchTrack().

const double PPSTools::urad = 1./1000000.

Definition at line 31 of file PPSUtilities.h.