1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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14 **************************************************************************/
17 //-------------------------------------------------------------------------
18 // Helper -DATA class ESD V0 vertex class
19 // contains effective errror parameterization
20 // Effective parameterization of resolution in DCA and PA as function of radii and momenta
21 // Mini-max coeficient fPMinFraction... fPMaxFraction...
22 // as limits for Error parameterization using Covariance matrix
23 // For detailes : see AliESDv0 class
25 // Origin: Marian Ivanov marian.ivanov@cern.ch
26 //-------------------------------------------------------------------------
29 #include "AliESDV0Params.h"
32 ClassImp(AliESDV0Params)
34 Int_t AliESDV0Params::fgStreamLevel = 0; // stream (debug) level
37 AliESDV0Params::AliESDV0Params() :
39 // These constants are used in the error parameterization using covariance matrix
40 // minimal sigma in AP and DCA
41 fPSigmaOffsetD0(0.03), // minimal sigma of error estimate
42 fPSigmaOffsetAP0(0.005),
44 // Effective parameterization of DCA resolution as function of pt and decay radii
47 fPSigmaOffsetDE(0.06),
52 // Effective parameterization of PA resolution as function of pt and decay radii
54 fPSigmaBase0APE(0.005),
58 fPSigmaP0APE(0.7*0.4),
59 fPSigmaP1APE(0.3*0.4),
64 fPMinFractionAP0(0.5),
65 fPMaxFractionAP0(1.5),
74 // Default constructor
75 // Consult AliESDv0 to see actual error parameterization