#include <HLLHCEvtVtxGenerator.h>

Inheritance diagram for HLLHCEvtVtxGenerator:

Public Member Functions
TMatrixD const *	GetInvLorentzBoost () const override

	HLLHCEvtVtxGenerator (const edm::ParameterSet &p)

HepMC::FourVector	newVertex (CLHEP::HepRandomEngine *) const override
	return a new event vertex More...

	~HLLHCEvtVtxGenerator () override

Public Member Functions inherited from BaseEvtVtxGenerator
	BaseEvtVtxGenerator (const edm::ParameterSet &)

void	produce (edm::Event &, const edm::EventSetup &) override

	~BaseEvtVtxGenerator () override

Public Member Functions inherited from edm::stream::EDProducer<>
	EDProducer ()=default

bool	hasAbilityToProduceInBeginLumis () const final

bool	hasAbilityToProduceInBeginRuns () const final

bool	hasAbilityToProduceInEndLumis () const final

bool	hasAbilityToProduceInEndRuns () const final

Static Public Member Functions
static void	fillDescriptions (edm::ConfigurationDescriptions &descriptions)

Private Member Functions
	HLLHCEvtVtxGenerator (const HLLHCEvtVtxGenerator &p)=delete

double	integrandCC (double x, double z, double t) const

double	intensity (double x, double y, double z, double t) const

HLLHCEvtVtxGenerator &	operator= (const HLLHCEvtVtxGenerator &rhs)=delete

double	sigma (double z, double epsilon, double beta, double betagamma) const

Private Attributes
const double	alphax

const double	alphay

const double	beta

const double	betagamma

const double	bets

const double	betx

const double	epss

const double	epssn

const double	epsx

const double	epsxn

const double	fMeanX

const double	fMeanY

const double	fMeanZ

const double	fTimeOffset

const double	gamma

const double	momeV

const double	oncc

const double	phi

const double	phiCR

const bool	RF800

const double	sigs

const double	sigx

const double	wcc

Additional Inherited Members
Public Types inherited from edm::stream::EDProducer<>
typedef CacheContexts< T... >	CacheTypes

typedef CacheTypes::GlobalCache	GlobalCache

typedef AbilityChecker< T... >	HasAbility

typedef CacheTypes::LuminosityBlockCache	LuminosityBlockCache

typedef LuminosityBlockContextT< LuminosityBlockCache, RunCache, GlobalCache >	LuminosityBlockContext

typedef CacheTypes::LuminosityBlockSummaryCache	LuminosityBlockSummaryCache

typedef CacheTypes::RunCache	RunCache

typedef RunContextT< RunCache, GlobalCache >	RunContext

typedef CacheTypes::RunSummaryCache	RunSummaryCache

Detailed Description

Definition at line 26 of file HLLHCEvtVtxGenerator.h.

Constructor & Destructor Documentation

◆ HLLHCEvtVtxGenerator() [1/2]

HLLHCEvtVtxGenerator::HLLHCEvtVtxGenerator ( const edm::ParameterSet & p )

Definition at line 51 of file HLLHCEvtVtxGenerator.cc.

     : BaseEvtVtxGenerator(p),
       fMeanX(p.getParameter<double>("MeanXIncm") * cm),
       fMeanY(p.getParameter<double>("MeanYIncm") * cm),
       fMeanZ(p.getParameter<double>("MeanZIncm") * cm),
       fTimeOffset(p.getParameter<double>("TimeOffsetInns") * ns * c_light),
       momeV(p.getParameter<double>("EprotonInGeV") * 1e9),
       gamma(momeV / pmass + 1.0),
       beta(std::sqrt((1.0 - 1.0 / gamma) * ((1.0 + 1.0 / gamma)))),
       betagamma(beta * gamma),
       phi(p.getParameter<double>("CrossingAngleInurad") * 1e-6),
       wcc(p.getParameter<double>("CrabFrequencyInMHz") * 1e6),
       RF800(p.getParameter<bool>("RF800")),
       betx(p.getParameter<double>("BetaCrossingPlaneInm")),
       bets(p.getParameter<double>("BetaSeparationPlaneInm")),
       epsxn(p.getParameter<double>("HorizontalEmittance")),
       epssn(p.getParameter<double>("VerticalEmittance")),
       sigs(p.getParameter<double>("BunchLengthInm")),
       alphax(p.getParameter<double>("CrabbingAngleCrossingInurad") * 1e-6),
       alphay(p.getParameter<double>("CrabbingAngleSeparationInurad") * 1e-6),
       oncc(alphax / phi),
       epsx(epsxn / (betagamma)),
       epss(epsx),
       sigx(std::sqrt(epsx * betx)),
       phiCR(oncc * phi)
  
 {}

◆ ~HLLHCEvtVtxGenerator()

HLLHCEvtVtxGenerator::~HLLHCEvtVtxGenerator ( )

override

Definition at line 79 of file HLLHCEvtVtxGenerator.cc.

79 {}

◆ HLLHCEvtVtxGenerator() [2/2]

HLLHCEvtVtxGenerator::HLLHCEvtVtxGenerator ( const HLLHCEvtVtxGenerator & p )

privatedelete

Copy constructor

Member Function Documentation

◆ fillDescriptions()

void HLLHCEvtVtxGenerator::fillDescriptions ( edm::ConfigurationDescriptions & descriptions )

static

Definition at line 29 of file HLLHCEvtVtxGenerator.cc.

                                                                                       {
   edm::ParameterSetDescription desc;
   desc.add<double>("MeanXIncm", 0.0);
   desc.add<double>("MeanYIncm", 0.0);
   desc.add<double>("MeanZIncm", 0.0);
   desc.add<double>("TimeOffsetInns", 0.0);
   desc.add<double>("EprotonInGeV", 7000.0);
   desc.add<double>("CrossingAngleInurad", 510.0);
   desc.add<double>("CrabbingAngleCrossingInurad", 380.0);
   desc.add<double>("CrabbingAngleSeparationInurad", 0.0);
   desc.add<double>("CrabFrequencyInMHz", 400.0);
   desc.add<bool>("RF800", false);
   desc.add<double>("BetaCrossingPlaneInm", 0.20);
   desc.add<double>("BetaSeparationPlaneInm", 0.20);
   desc.add<double>("HorizontalEmittance", 2.5e-06);
   desc.add<double>("VerticalEmittance", 2.05e-06);
   desc.add<double>("BunchLengthInm", 0.09);
   desc.add<edm::InputTag>("src");
   desc.add<bool>("readDB");
   descriptions.add("HLLHCEvtVtxGenerator", desc);
 }

References edm::ConfigurationDescriptions::add(), and edm::ParameterSetDescription::add().

◆ GetInvLorentzBoost()

TMatrixD const* HLLHCEvtVtxGenerator::GetInvLorentzBoost ( ) const

inlineoverridevirtual

This method - and the comment - is a left-over from COBRA-OSCAR time : return the last generated event vertex. If no vertex has been generated yet, a NULL pointer is returned.

Implements BaseEvtVtxGenerator.

Definition at line 37 of file HLLHCEvtVtxGenerator.h.

37 { return nullptr; };

◆ integrandCC()

double HLLHCEvtVtxGenerator::integrandCC	(	double	x,
		double	z,
		double	t
	)		const

private

Definition at line 146 of file HLLHCEvtVtxGenerator.cc.

                                                                             {
   constexpr double local_c_light = 2.99792458e8;
  
   const double k = wcc / local_c_light * two_pi;
   const double k2 = k * k;
   const double cos = std::cos(phi / 2.0);
   const double sin = std::sin(phi / 2.0);
   const double cos2 = cos * cos;
   const double sin2 = sin * sin;
  
   const double sigx2 = sigx * sigx;
   const double sigmax2 = sigx2 * (1 + z * z / (betx * betx));
  
   const double sigs2 = sigs * sigs;
  
   constexpr double factorRMSgauss4 =
       1. / sqrt2 / gamma34 * gamma14;  // # Factor to take rms sigma as input of the supergaussian
   constexpr double NormFactorGauss4 = sqrt2to5 * gamma54 * gamma54;
  
   const double sinCR = std::sin(phiCR / 2.0);
   const double sinCR2 = sinCR * sinCR;
  
   double result = -1.0;
  
   if (!RF800) {
     const double norm = 2.0 / (two_pi * sigs2);
     const double cosks = std::cos(k * z);
     const double sinkct = std::sin(k * ct);
     result = norm *
              std::exp(-ct * ct / sigs2 - z * z * cos2 / sigs2 -
                       1.0 / (4 * k2 * sigmax2) *
                           (
                               //-4*cosks*cosks * sinkct*sinkct * sinCR2 // comes from integral over x
                               -8 * z * k * std::sin(k * z) * std::cos(k * ct) * sin * sinCR + 2 * sinCR2 -
                               std::cos(2 * k * (z - ct)) * sinCR2 - std::cos(2 * k * (z + ct)) * sinCR2 +
                               4 * k2 * z * z * sin2) -
                       x * x * (cos2 / sigmax2 + sin2 / sigs2)               // contribution from x integrand
                       + x * ct * sin / sigs2                                // contribution from x integrand
                       + 2 * x * cos * cosks * sinkct * sinCR / k / sigmax2  // contribution from x integrand
                       //+(2*ct/k)*np.cos(k*s)*np.sin(k*ct) *(sin*sinCR)/(sigs2*cos)  # small term
                       //+ct**2*(sin2/sigs4)/(cos2/sigmax2)                            # small term
                       ) /
              (1.0 + (z * z) / (betx * betx)) / std::sqrt(1.0 + (z * z) / (bets * bets));
  
   } else {
     const double norm = 2.0 / (NormFactorGauss4 * sigs2 * factorRMSgauss4);
     const double sigs4 = sigs2 * sigs2 * factorRMSgauss4 * factorRMSgauss4;
     const double cosks = std::cos(k * z);
     const double sinct = std::sin(k * ct);
     result =
         norm *
         std::exp(-ct * ct * ct * ct / sigs4 - z * z * z * z * cos2 * cos2 / sigs4 - 6 * ct * ct * z * z * cos2 / sigs4 -
                  sin2 / (4 * k2 * sigmax2) *
                      (2 + 4 * k2 * z * z - std::cos(2 * k * (z - ct)) - std::cos(2 * k * (z + ct)) -
                       8 * k * s * std::cos(k * ct) * std::sin(k * z) - 4 * cosks * cosks * sinct * sinct)) /
         std::sqrt(1 + z * z / (betx * betx)) / std::sqrt(1 + z * z / (bets * bets));
   }
  
   return result;
 }

References bets, betx, funct::cos(), JetChargeProducer_cfi::exp, dqmdumpme::k, local_c_light, phi, phiCR, mps_fire::result, RF800, alignCSCRings::s, sigs, sigx, funct::sin(), mathSSE::sqrt(), wcc, x, and z.

Referenced by intensity().

◆ intensity()

double HLLHCEvtVtxGenerator::intensity	(	double	x,
		double	y,
		double	z,
		double	t
	)		const

private

Definition at line 126 of file HLLHCEvtVtxGenerator.cc.

                                                                                    {
   //---c in m/s --- remember t is already in meters
   constexpr double c = 2.99792458e+8;  // m/s
  
   const double sigmay = sigma(z, epssn, bets, betagamma);
  
   const double alphay_mod = alphay * std::cos(wcc * (z - t) / c);
  
   const double cay = std::cos(alphay_mod);
   const double say = std::sin(alphay_mod);
  
   const double dy = -(z - t) * say - y * cay;
  
   const double xzt_density = integrandCC(x, z, t);
  
   const double norm = two_pi * sigmay;
  
   return (std::exp(-dy * dy / (sigmay * sigmay)) * xzt_density / norm);
 }

References alphay, betagamma, bets, HltBtagPostValidation_cff::c, funct::cos(), PVValHelper::dy, epssn, JetChargeProducer_cfi::exp, integrandCC(), sigma(), funct::sin(), OrderedSet::t, wcc, x, y, and z.

Referenced by newVertex().

◆ newVertex()

HepMC::FourVector HLLHCEvtVtxGenerator::newVertex ( CLHEP::HepRandomEngine * engine ) const

overridevirtual

return a new event vertex

Implements BaseEvtVtxGenerator.

Definition at line 81 of file HLLHCEvtVtxGenerator.cc.

                                                                                   {
   double imax = intensity(0., 0., 0., 0.);
  
   double x(0.), y(0.), z(0.), t(0.), i(0.);
  
   int count = 0;
  
   auto shoot = [&]() { return CLHEP::RandFlat::shoot(engine); };
  
   do {
     z = (shoot() - 0.5) * 6.0 * sigs;
     t = (shoot() - 0.5) * 6.0 * sigs;
     x = (shoot() - 0.5) * 12.0 * sigma(0.0, epsxn, betx, betagamma);
     y = (shoot() - 0.5) * 12.0 * sigma(0.0, epssn, bets, betagamma);
  
     i = intensity(x, y, z, t);
  
     if (i > imax)
       edm::LogError("Too large intensity") << "i>imax : " << i << " > " << imax << endl;
     ++count;
   } while ((i < imax * shoot()) && count < 10000);
  
   if (count > 9999)
     edm::LogError("Too many tries ") << " count : " << count << endl;
  
   //---convert to mm
   x *= 1000.0;
   y *= 1000.0;
   z *= 1000.0;
   t *= 1000.0;
  
   x += fMeanX;
   y += fMeanY;
   z += fMeanZ;
   t += fTimeOffset;
  
   return HepMC::FourVector(x, y, z, t);
 }

References betagamma, bets, betx, KineDebug3::count(), epssn, epsxn, fMeanX, fMeanY, fMeanZ, fTimeOffset, mps_fire::i, intensity(), sigma(), sigs, OrderedSet::t, x, y, and z.

◆ operator=()

HLLHCEvtVtxGenerator& HLLHCEvtVtxGenerator::operator= ( const HLLHCEvtVtxGenerator & rhs )

privatedelete

Copy assignment operator

◆ sigma()

double HLLHCEvtVtxGenerator::sigma	(	double	z,
		double	epsilon,
		double	beta,
		double	betagamma
	)		const

private

Definition at line 120 of file HLLHCEvtVtxGenerator.cc.

                                                                                                 {
   double sigma = std::sqrt(epsilon * (beta + z * z / beta) / betagamma);
  
   return sigma;
 }

References beta, betagamma, geometryDiff::epsilon, mathSSE::sqrt(), and z.

Referenced by intensity(), and newVertex().

Member Data Documentation

◆ alphax

const double HLLHCEvtVtxGenerator::alphax

private

Definition at line 80 of file HLLHCEvtVtxGenerator.h.

◆ alphay

const double HLLHCEvtVtxGenerator::alphay

private

Definition at line 83 of file HLLHCEvtVtxGenerator.h.

Referenced by intensity().

◆ beta

const double HLLHCEvtVtxGenerator::beta

private

Definition at line 52 of file HLLHCEvtVtxGenerator.h.

Referenced by sigma().

◆ betagamma

const double HLLHCEvtVtxGenerator::betagamma

private

Definition at line 53 of file HLLHCEvtVtxGenerator.h.

Referenced by intensity(), newVertex(), and sigma().

◆ bets

const double HLLHCEvtVtxGenerator::bets

private

Definition at line 68 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC(), intensity(), and newVertex().

◆ betx

const double HLLHCEvtVtxGenerator::betx

private

Definition at line 65 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC(), and newVertex().

◆ epss

const double HLLHCEvtVtxGenerator::epss

private

Definition at line 92 of file HLLHCEvtVtxGenerator.h.

◆ epssn

const double HLLHCEvtVtxGenerator::epssn

private

Definition at line 74 of file HLLHCEvtVtxGenerator.h.

Referenced by intensity(), and newVertex().

◆ epsx

const double HLLHCEvtVtxGenerator::epsx

private

Definition at line 89 of file HLLHCEvtVtxGenerator.h.

◆ epsxn

const double HLLHCEvtVtxGenerator::epsxn

private

Definition at line 71 of file HLLHCEvtVtxGenerator.h.

Referenced by newVertex().

◆ fMeanX

const double HLLHCEvtVtxGenerator::fMeanX

private

Definition at line 47 of file HLLHCEvtVtxGenerator.h.

Referenced by newVertex().

◆ fMeanY

const double HLLHCEvtVtxGenerator::fMeanY

private

Definition at line 47 of file HLLHCEvtVtxGenerator.h.

Referenced by newVertex().

◆ fMeanZ

const double HLLHCEvtVtxGenerator::fMeanZ

private

Definition at line 47 of file HLLHCEvtVtxGenerator.h.

Referenced by newVertex().

◆ fTimeOffset

const double HLLHCEvtVtxGenerator::fTimeOffset

private

Definition at line 47 of file HLLHCEvtVtxGenerator.h.

Referenced by newVertex().

◆ gamma

const double HLLHCEvtVtxGenerator::gamma

private

Definition at line 51 of file HLLHCEvtVtxGenerator.h.

◆ momeV

const double HLLHCEvtVtxGenerator::momeV

private

Definition at line 50 of file HLLHCEvtVtxGenerator.h.

◆ oncc

const double HLLHCEvtVtxGenerator::oncc

private

Definition at line 86 of file HLLHCEvtVtxGenerator.h.

◆ phi

const double HLLHCEvtVtxGenerator::phi

private

Definition at line 56 of file HLLHCEvtVtxGenerator.h.

Referenced by Particle.Particle::__str__(), integrandCC(), and ntupleDataFormat.Track::phiPull().

◆ phiCR

const double HLLHCEvtVtxGenerator::phiCR

private

Definition at line 98 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC().

◆ RF800

const bool HLLHCEvtVtxGenerator::RF800

private

Definition at line 62 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC().

◆ sigs

const double HLLHCEvtVtxGenerator::sigs

private

Definition at line 77 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC(), and newVertex().

◆ sigx

const double HLLHCEvtVtxGenerator::sigx

private

Definition at line 95 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC().

◆ wcc

const double HLLHCEvtVtxGenerator::wcc

private

Definition at line 59 of file HLLHCEvtVtxGenerator.h.

Referenced by integrandCC(), and intensity().

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ HLLHCEvtVtxGenerator() [1/2]

◆ ~HLLHCEvtVtxGenerator()

◆ HLLHCEvtVtxGenerator() [2/2]

Member Function Documentation

◆ fillDescriptions()

◆ GetInvLorentzBoost()

◆ integrandCC()

◆ intensity()

◆ newVertex()

◆ operator=()

◆ sigma()

Member Data Documentation

◆ alphax

◆ alphay

◆ beta

◆ betagamma

◆ bets

◆ betx

◆ epss

◆ epssn

◆ epsx

◆ epsxn

◆ fMeanX

◆ fMeanY

◆ fMeanZ

◆ fTimeOffset

◆ gamma

◆ momeV

◆ oncc

◆ phi

◆ phiCR

◆ RF800

◆ sigs

◆ sigx

◆ wcc