eopUtils Namespace Reference

Functions
float	ecalEta (float EtaParticle, float Zvertex, float RhoVertex)

Variables
static constexpr float	etaBarrelEndcap = 1.479
static constexpr float	R_ECAL = 136.5
static constexpr float	Z_Endcap = 328.0

Function Documentation

ecalEta()

float eopUtils::ecalEta	(	float	EtaParticle,
		float	Zvertex,
		float	RhoVertex
	)

Definition at line 189 of file EopElecTreeWriter.cc.

References ETA, etaBarrelEndcap, dqm-mbProfile::log, M_PI, R_ECAL, funct::tan(), and Z_Endcap.

Referenced by EopElecTreeWriter::analyze().

                                                                   {
    if (EtaParticle != 0.) {
      float Theta = 0.0;
      float ZEcal = (R_ECAL - RhoVertex) * sinh(EtaParticle) + Zvertex;

      if (ZEcal != 0.0)
        Theta = atan(R_ECAL / ZEcal);
      if (Theta < 0.0)
        Theta = Theta + M_PI;

      float ETA = -log(tan(0.5 * Theta));

      if (fabs(ETA) > etaBarrelEndcap) {
        float Zend = Z_Endcap;
        if (EtaParticle < 0.0)
          Zend = -Zend;
        float Zlen = Zend - Zvertex;
        float RR = Zlen / sinh(EtaParticle);
        Theta = atan((RR + RhoVertex) / Zend);
        if (Theta < 0.0)
          Theta = Theta + M_PI;
        ETA = -log(tan(0.5 * Theta));
      }
      return ETA;
    } else {
      edm::LogWarning("") << "[EcalPositionFromTrack::etaTransformation] Warning: Eta equals to zero, not correcting";
      return EtaParticle;
    }
  }

Variable Documentation

etaBarrelEndcap

constexpr float eopUtils::etaBarrelEndcap = 1.479

static

Definition at line 186 of file EopElecTreeWriter.cc.

R_ECAL

constexpr float eopUtils::R_ECAL = 136.5

static

Definition at line 184 of file EopElecTreeWriter.cc.

Z_Endcap

constexpr float eopUtils::Z_Endcap = 328.0

static

Definition at line 185 of file EopElecTreeWriter.cc.