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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 | ||
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 | |
24 | // | |
25 | // Origin: Marian Ivanov marian.ivanov@cern.ch | |
26 | //------------------------------------------------------------------------- | |
27 | ||
28 | ||
29 | #include "AliESDV0MIParams.h" | |
30 | ||
31 | ||
32 | ClassImp(AliESDV0MIParams) | |
33 | ||
34 | ||
35 | AliESDV0MIParams::AliESDV0MIParams(){ | |
36 | // | |
37 | // Default constructor | |
38 | // Consult AliESDV0MI to see actual error parameterization | |
39 | // | |
40 | ||
41 | // | |
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; // | |
46 | // | |
47 | // Effective parameterization of DCA resolution as function of pt and decay radii | |
48 | // | |
49 | fPSigmaMaxDE = 0.5; | |
50 | fPSigmaOffsetDE = 0.06; | |
51 | fPSigmaCoefDE = 0.02; | |
52 | fPSigmaRminDE = 2.7; | |
53 | // | |
54 | // | |
55 | // Effective parameterization of PA resolution as function of pt and decay radii | |
56 | // | |
57 | fPSigmaBase0APE = 0.005; | |
58 | fPSigmaMaxAPE = 0.06; | |
59 | fPSigmaR0APE = 0.02; | |
60 | fPSigmaR1APE = 0.1; | |
61 | fPSigmaP0APE = 0.7*0.4; | |
62 | fPSigmaP1APE = 0.3*0.4; | |
63 | // | |
64 | // | |
65 | // Minimax parameters | |
66 | // | |
67 | fPMinFractionAP0 =0.5; | |
68 | fPMaxFractionAP0 =1.5; | |
69 | fPMinAP0 =0.003; | |
70 | fPMinFractionD0 =0.5; | |
71 | fPMaxFractionD0 =1.5; | |
72 | fPMinD0 =0.05; | |
73 | // | |
74 | } | |
75 | ||
76 | ||
77 |