ECCE @ EIC Software
Reference for
ECCE @ EIC
simulation and reconstruction software on GitHub
Home page
Related Pages
Modules
Namespaces
Classes
Files
External Links
File List
File Members
All
Classes
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Friends
Macros
Groups
Pages
G4XAqmTotal.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4XAqmTotal.cc
1
//
2
// ********************************************************************
3
// * License and Disclaimer *
4
// * *
5
// * The Geant4 software is copyright of the Copyright Holders of *
6
// * the Geant4 Collaboration. It is provided under the terms and *
7
// * conditions of the Geant4 Software License, included in the file *
8
// * LICENSE and available at http://cern.ch/geant4/license . These *
9
// * include a list of copyright holders. *
10
// * *
11
// * Neither the authors of this software system, nor their employing *
12
// * institutes,nor the agencies providing financial support for this *
13
// * work make any representation or warranty, express or implied, *
14
// * regarding this software system or assume any liability for its *
15
// * use. Please see the license in the file LICENSE and URL above *
16
// * for the full disclaimer and the limitation of liability. *
17
// * *
18
// * This code implementation is the result of the scientific and *
19
// * technical work of the GEANT4 collaboration. *
20
// * By using, copying, modifying or distributing the software (or *
21
// * any work based on the software) you agree to acknowledge its *
22
// * use in resulting scientific publications, and indicate your *
23
// * acceptance of all terms of the Geant4 Software license. *
24
// ********************************************************************
25
//
26
//
27
// -------------------------------------------------------------------
28
// GEANT4 Class file
29
//
30
// For information related to this code contact:
31
//
32
// File name: G4XAqmTotal
33
//
34
// Author:
35
//
36
// Creation date: 15 April 1999
37
//
38
// Modifications:
39
//
40
// Additive Quark Model total cross section
41
// (H.J. Lipkin and F. Scheck, Phys.Rev. 16 (1966) 71
42
//
43
// -------------------------------------------------------------------
44
45
#include "
globals.hh
"
46
#include "
G4ios.hh
"
47
#include "
G4Pow.hh
"
48
#include "
G4SystemOfUnits.hh
"
49
#include "
G4XAqmTotal.hh
"
50
#include "
G4KineticTrack.hh
"
51
#include "
G4ParticleDefinition.hh
"
52
53
54
// Validity range of this cross-section
55
const
G4double
G4XAqmTotal::_lowLimit
= 0.;
56
const
G4double
G4XAqmTotal::_highLimit
=
DBL_MAX
;
57
58
G4XAqmTotal::G4XAqmTotal
()
59
{
60
// As a first approximation the model is assumed to be valid over
61
// the entire energy range
62
}
63
64
65
G4XAqmTotal::~G4XAqmTotal
()
66
{ }
67
68
69
G4bool
G4XAqmTotal::operator==
(
const
G4XAqmTotal
&
right
)
const
70
{
71
return
(
this
== (
G4XAqmTotal
*) &right);
72
}
73
74
75
G4bool
G4XAqmTotal::operator!=
(
const
G4XAqmTotal
&
right
)
const
76
{
77
return
(
this
!= (
G4XAqmTotal
*) &right);
78
}
79
80
81
G4double
G4XAqmTotal::CrossSection
(
const
G4KineticTrack
& trk1,
const
G4KineticTrack
& trk2)
const
82
{
83
G4double
sigma = 0.;
84
85
// Get strangeness content
86
const
G4ParticleDefinition
* def1 = trk1.
GetDefinition
();
87
G4int
sTrk1 = def1->
GetQuarkContent
(3) + def1->
GetAntiQuarkContent
(3);
88
const
G4ParticleDefinition
* def2 = trk2.
GetDefinition
();
89
G4int
sTrk2 = def2->
GetQuarkContent
(3) + def2->
GetAntiQuarkContent
(3);
90
91
// Get non-strange quark content
92
G4int
qTrk1 = def1->
GetQuarkContent
(1) + def1->
GetAntiQuarkContent
(1) +
93
def1->
GetQuarkContent
(2) + def1->
GetAntiQuarkContent
(2) +
94
def1->
GetQuarkContent
(4) + def1->
GetAntiQuarkContent
(4) +
95
def1->
GetQuarkContent
(5) + def1->
GetAntiQuarkContent
(5) +
96
def1->
GetQuarkContent
(6) + def1->
GetAntiQuarkContent
(6);
97
98
G4int
qTrk2 = def2->
GetQuarkContent
(1) + def2->
GetAntiQuarkContent
(1) +
99
def2->
GetQuarkContent
(2) + def2->
GetAntiQuarkContent
(2) +
100
def2->
GetQuarkContent
(4) + def2->
GetAntiQuarkContent
(4) +
101
def2->
GetQuarkContent
(5) + def2->
GetAntiQuarkContent
(5) +
102
def2->
GetQuarkContent
(6) + def2->
GetAntiQuarkContent
(6);
103
104
G4double
sRatio1 = 0.;
105
if
(qTrk1 != 0) sRatio1 = sTrk1 / qTrk1;
106
107
G4double
sRatio2 = 0.;
108
if
(qTrk2 != 0) sRatio2 = sTrk2 / qTrk2;
109
110
// Calculate the number of colliding mesons
111
G4int
nMesons = 0;
112
G4int
nQ1 = sTrk1 + qTrk1;
113
114
if
(nQ1 == 2) nMesons++;
115
G4int
nQ2 = sTrk2 + qTrk2;
116
if
(nQ2 == 2) nMesons++;
117
118
// Cross-section (units to be checked!)
119
sigma = 40. *
G4Pow::GetInstance
()->
powN
((2.0/3.0),nMesons) * (1. - 0.4 * sRatio1) * (1. - 0.4 * sRatio2) *
millibarn
;
120
121
return
sigma;
122
}
123
124
125
G4String
G4XAqmTotal::Name
()
const
126
{
127
G4String
name
(
"AqmTotalCrossSection"
);
128
return
name
;
129
}
130
131
132
133
G4bool
G4XAqmTotal::IsValid
(
G4double
e
)
const
134
{
135
G4bool
answer =
InLimits
(e,
_lowLimit
,
_highLimit
);
136
137
return
answer;
138
}
geant4
tree
geant4-10.6-release
source
processes
hadronic
models
im_r_matrix
src
G4XAqmTotal.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:44
using
1.8.2 with
ECCE GitHub integration