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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8 * documentation strictly for non-commercial purposes is hereby granted *
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14 **************************************************************************/
17 //-------------------------------------------------------------------------
18 // Helper -DATA class ESD V0MI 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 AliESDV0MI class
25 // Origin: Marian Ivanov marian.ivanov@cern.ch
26 //-------------------------------------------------------------------------
29 #include "AliESDV0MIParams.h"
32 ClassImp(AliESDV0MIParams)
35 AliESDV0MIParams::AliESDV0MIParams(){
37 // Default constructor
38 // Consult AliESDV0MI to see actual error parameterization
42 // This constants are used in the error parameterization using covariance matrix
43 // minimal sigma in AP and DCA
44 fPSigmaOffsetD0 = 0.03; // minimal sigma of error estimate
45 fPSigmaOffsetAP0 = 0.005; //
47 // Effective parameterization of DCA resolution as function of pt and decay radii
50 fPSigmaOffsetDE = 0.06;
55 // Effective parameterization of PA resolution as function of pt and decay radii
57 fPSigmaBase0APE = 0.005;
61 fPSigmaP0APE = 0.7*0.4;
62 fPSigmaP1APE = 0.3*0.4;
67 fPMinFractionAP0 =0.5;
68 fPMaxFractionAP0 =1.5;