Line data    Source code

       1             : /**************************************************************************
       2             :  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
       3             :  *                                                                        *
       4             :  * Author: The ALICE Off-line Project.                                    *
       5             :  * Contributors are mentioned in the code where appropriate.              *
       6             :  *                                                                        *
       7             :  * Permission to use, copy, modify and distribute this software and its   *
       8             :  * documentation strictly for non-commercial purposes is hereby granted   *
       9             :  * without fee, provided that the above copyright notice appears in all   *
      10             :  * copies and that both the copyright notice and this permission notice   *
      11             :  * appear in the supporting documentation. The authors make no claims     *
      12             :  * about the suitability of this software for any purpose. It is          *
      13             :  * provided "as is" without express or implied warranty.                  *
      14             :  **************************************************************************/
      15             : 
      16             : /* $Id$ */
      17             : //
      18             : // Class for fast simulation of the ALICE Muon Spectrometer
      19             : // Tracking Efficiency.
      20             : // The efficiency depends on trasverse momentum pt, polar angle theta and azimuthal angle phi.
      21             : //
      22             : // Author: Alessandro de Falco 
      23             : // alessandro.de.falco@ca.infn.it
      24             : // 
      25             : 
      26             : #include <TMath.h>
      27             : 
      28             : #include "AliFastMuonTrackingEff.h"
      29             : #include "AliMUONFastTracking.h"
      30             : 
      31          12 : ClassImp(AliFastMuonTrackingEff)
      32             : 
      33             : 
      34             : AliFastMuonTrackingEff::AliFastMuonTrackingEff() :
      35           0 :     AliFastResponse("Efficiency", "Muon Tracking Efficiency"),
      36           0 :     fBackground(1.),
      37           0 :     fCharge(1.),
      38           0 :     fFastTracking(0)
      39           0 : {
      40             : //
      41             : // Constructor
      42           0 : }
      43             : 
      44             : AliFastMuonTrackingEff::AliFastMuonTrackingEff(const AliFastMuonTrackingEff& eff)
      45           0 :     :AliFastResponse(eff),
      46           0 :     fBackground(1.),
      47           0 :     fCharge(1.),
      48           0 :     fFastTracking(0)
      49           0 : {
      50             : // Copy constructor
      51           0 :     eff.Copy(*this);
      52           0 : }
      53             : 
      54             : void AliFastMuonTrackingEff::Init()
      55             : {
      56             : //
      57             : // Initialization
      58           0 :     fFastTracking = AliMUONFastTracking::Instance();
      59           0 :     fFastTracking->Init(fBackground);
      60           0 : }
      61             : 
      62             : 
      63             : 
      64             : Float_t AliFastMuonTrackingEff::Evaluate(Float_t /*charge*/, Float_t pt, Float_t theta, Float_t phi)
      65             : {
      66             : //
      67             : // Evaluate the efficience for muon with 3-vector (pt, theta, phi)
      68           0 :     Float_t p = pt / TMath::Sin(theta*TMath::Pi()/180.);
      69           0 :     Float_t eff =  fFastTracking->Efficiency(p, theta, phi, Int_t(fCharge));
      70           0 :     return eff;
      71             : }
      72             : 
      73             : 
      74             : AliFastMuonTrackingEff& AliFastMuonTrackingEff::operator=(const  AliFastMuonTrackingEff& rhs)
      75             : {
      76             : // Assignment operator
      77           0 :     rhs.Copy(*this);
      78           0 :     return *this;
      79             : }
      80             :