egammaBackShape Class Reference

EM cluster shower shape calculations in 3rd sampling. More...

#include <egammaBackShape.h>

Collaboration diagram for egammaBackShape:

Classes
struct	Info

Static Public Member Functions
static StatusCode	execute (const xAOD::CaloCluster &cluster, const CaloDetDescrManager &cmgr, const CaloCellContainer &cell_container, Info &info, bool ExecOtherVariables=true)

Detailed Description

EM cluster shower shape calculations in 3rd sampling.

Calculate the width in the back layer around the eta,phi of the hottest cell in the middle layer.

Author

Frederic Derue derue.nosp@m.@lpn.nosp@m.he.in.nosp@m.2p3..nosp@m.fr

Christos Anastopoulos

Definition at line 26 of file egammaBackShape.h.

Member Function Documentation

execute()

StatusCode egammaBackShape::execute ( const xAOD::CaloCluster & cluster, const CaloDetDescrManager & cmgr, const CaloCellContainer & cell_container, Info & info, bool ExecOtherVariables = true )

static

Definition at line 14 of file egammaBackShape.cxx.

{
  //
  // Estimate shower shapes from third compartment
  // based on hottest cell and deta,dphi
  // with eta = cluster->eta(sam)
  //      phi = cluster->phi(sam)
  //
 
  // check if cluster is in barrel or in the end-cap
  if (!cluster.inBarrel() && !cluster.inEndcap()) {
    return StatusCode::SUCCESS;
  }
 
  double eallsamples = egammaEnergyPositionAllSamples::e(cluster);
  double e3 = egammaEnergyPositionAllSamples::e3(cluster);
 
  // fraction of energy deposited in third sampling
  info.f3 = std::abs(eallsamples) > 0. ? e3 / eallsamples : 0.;
 
  // check if cluster is in barrel or end-cap
  const bool in_barrel = egammaEnergyPositionAllSamples::inBarrel(cluster, 3);
 
  // define accordingly position of CaloSampling
  const CaloSampling::CaloSample sam = in_barrel ? CaloSampling::EMB3 : CaloSampling::EME3;
  const CaloSampling::CaloSample sam2 = in_barrel ? CaloSampling::EMB2 : CaloSampling::EME2;
 
  CaloCell_ID::SUBCALO subcalo = CaloCell_ID::LAREM;
  bool barrel = false;
  int sampling_or_module = 0;
 
  // From the original (eta,phi) position, find the location
  // (sampling, barrel/end-cap, granularity)
  // For this we use the tool egammaEnergyAllSamples
  // which uses the CaloCluster method inBarrel() and inEndcap()
  // but also, in case close to the crack region where both
  // boolean can be true, the energy reconstructed in the sampling
  //
 
  // Fetch eta and phi of the sampling
  // Note that we use m_sam2 in the 2nd sampling, not in presampler
  double eta = cluster.etamax(sam2);
  double phi = cluster.phimax(sam2);
 
  if ((eta == 0. && phi == 0.) || std::abs(eta) > 100) {
    return StatusCode::SUCCESS;
  }
 
  // granularity in (eta,phi) in the pre sampler
  // CaloCellList needs both enums: subCalo and CaloSample
  CaloDetDescrManager::decode_sample(subcalo, barrel, sampling_or_module, sam);
 
  // Get the corresponding grannularities : needs to know where you are
  //                  the easiest is to look for the CaloDetDescrElement
  const CaloDetDescrElement* dde =
    cmgr.get_element(subcalo, sampling_or_module, barrel, eta, phi);
  // if object does not exist then return
  if (!dde) {
    return StatusCode::SUCCESS;
  }
 
  // local granularity
  double deta = dde->deta();
  double dphi = dde->dphi();
  // change values of eta,phi
  eta = dde->eta_raw();
  phi = dde->phi_raw();
 
  // estimate the relevant quantities around the hottest cell
  // in the following eta X phi windows
  CaloLayerCalculator calc;
 
  // 3X3
  StatusCode sc =
    calc.fill(cmgr, &cell_container, eta, phi, 3. * deta, 3. * dphi, sam);
  if (sc.isFailure()) {
    return sc;
  }
  info.e333 = calc.em();
 
  if (ExecOtherVariables) {
 
    CaloCellList cell_list(&cmgr, &cell_container);
    // 7x7
    cell_list.select(eta, phi, 7.0 * deta, 7.0 * dphi, sam);
 
    calc.fill(
      cell_list.begin(), cell_list.end(), eta, phi, 7. * deta, 7. * dphi, sam);
    info.e377 = calc.em();
 
    // 5X5
    calc.fill(
      cell_list.begin(), cell_list.end(), eta, phi, 5. * deta, 5. * dphi, sam);
    info.e355 = calc.em();
 
    // 3X7
    calc.fill(
      cell_list.begin(), cell_list.end(), eta, phi, 3. * deta, 7. * dphi, sam);
    info.e337 = calc.em();
 
    // 3X5
    calc.fill(
      cell_list.begin(), cell_list.end(), eta, phi, 3. * deta, 5. * dphi, sam);
    info.e335 = calc.em();
  }
 
  // f3core
  if (eallsamples > 0. && info.e333 > -999.) {
    info.f3core = info.e333 / eallsamples;
  }
 
  return StatusCode::SUCCESS;
}

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The documentation for this class was generated from the following files:

• egammaBackShape.h
• egammaBackShape.cxx