BetafuncEvtVtxGenerator.h

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#ifndef IOMC_BetafuncEvtVtxGenerator_H
#define IOMC_BetafuncEvtVtxGenerator_H
 
/*
________________________________________________________________________
 
 BetafuncEvtVtxGenerator
 
 Smear vertex according to the Beta function on the transverse plane
 and a Gaussian on the z axis. It allows the beam to have a crossing
 angle (dx/dz and dy/dz).
 
 Based on GaussEvtVtxGenerator.h
 implemented by Francisco Yumiceva (yumiceva@fnal.gov)
 
 FERMILAB
 2006
________________________________________________________________________
*/
 
#include "IOMC/EventVertexGenerators/interface/BaseEvtVtxGenerator.h"
#include "FWCore/Framework/interface/ESWatcher.h"
#include "FWCore/Utilities/interface/ESGetToken.h"
#include "CondFormats/DataRecord/interface/SimBeamSpotObjectsRcd.h"
#include "CondFormats/BeamSpotObjects/interface/SimBeamSpotObjects.h"
 
namespace CLHEP {
  class HepRandomEngine;
}
 
class BetafuncEvtVtxGenerator : public BaseEvtVtxGenerator {
public:
  BetafuncEvtVtxGenerator(const edm::ParameterSet& p);
  ~BetafuncEvtVtxGenerator() override;
 
  void beginLuminosityBlock(edm::LuminosityBlock const&, edm::EventSetup const&) override;
 
  //virtual CLHEP::Hep3Vector * newVertex();
  HepMC::FourVector newVertex(CLHEP::HepRandomEngine*) const override;
 
  TMatrixD const* GetInvLorentzBoost() const override;
 
  void sigmaZ(double s = 1.0);
 
  void X0(double m = 0) { fX0 = m; }
  void Y0(double m = 0) { fY0 = m; }
  void Z0(double m = 0) { fZ0 = m; }
 
  void betastar(double m = 0) { fbetastar = m; }
  void emittance(double m = 0) { femittance = m; }
 
  double BetaFunction(double z, double z0) const;
 
private:
  BetafuncEvtVtxGenerator(const BetafuncEvtVtxGenerator& p) = delete;
  BetafuncEvtVtxGenerator& operator=(const BetafuncEvtVtxGenerator& rhs) = delete;
 
  void setBoost(double alpha, double phi);
 
private:
  bool readDB_;
 
  double fX0, fY0, fZ0;
  double fSigmaZ;
  //double fdxdz, fdydz;
  double fbetastar, femittance;
  //  double falpha;
  double fTimeOffset;
 
  TMatrixD boost_;
 
  void update(const edm::EventSetup& iEventSetup);
  edm::ESWatcher<SimBeamSpotObjectsRcd> parameterWatcher_;
  edm::ESGetToken<SimBeamSpotObjects, SimBeamSpotObjectsRcd> beamToken_;
};
 
#endif