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G4eeToTwoPiModel.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4eeToTwoPiModel.cc
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4eeToTwoPiModel
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 25.10.2003
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//
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// Modifications:
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//
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//
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// -------------------------------------------------------------------
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#include "
G4eeToTwoPiModel.hh
"
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#include "
Randomize.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
G4PionPlus.hh
"
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#include "
G4PionMinus.hh
"
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#include "
G4DynamicParticle.hh
"
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#include "
G4PhysicsVector.hh
"
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#include "
G4PhysicsLinearVector.hh
"
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#include "
G4eeCrossSections.hh
"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace
std;
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G4eeToTwoPiModel::G4eeToTwoPiModel
(
G4eeCrossSections
* cr,
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G4double
maxkinEnergy,
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G4double
binWidth)
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:
G4Vee2hadrons
(cr,
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2.0*
G4PionPlus
::PionPlus()->GetPDGMass(),
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maxkinEnergy,
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binWidth)
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{
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G4cout
<<
"#####G4eeToTwoPiModel####"
<<
G4endl
;
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massPi
=
G4PionPlus::PionPlus
()->
GetPDGMass
();
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massRho
= 775.5*
MeV
;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4eeToTwoPiModel::~G4eeToTwoPiModel
()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double
G4eeToTwoPiModel::PeakEnergy
()
const
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{
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return
massRho
;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double
G4eeToTwoPiModel::ComputeCrossSection
(
G4double
e
)
const
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{
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return
cross
->
CrossSection2pi
(e);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void
G4eeToTwoPiModel::SampleSecondaries
(std::vector<G4DynamicParticle*>* newp,
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G4double
e
,
const
G4ThreeVector
& direction)
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{
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G4double
tkin = 0.5*e -
massPi
;
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if
(tkin < 0.0) tkin = 0.0;
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G4double
cost;
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do
{
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cost = 2.0*
G4UniformRand
() - 1.0;
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// Loop checking, 07-Aug-2015, Vladimir Ivanchenko
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}
while
(
G4UniformRand
() > 1.0 - cost*cost );
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G4double
sint = sqrt(1.0 - cost*cost);
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G4double
phi
=
twopi
*
G4UniformRand
();
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G4ThreeVector
dir
(sint*cos(phi),sint*sin(phi), cost);
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dir.
rotateUz
(direction);
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// create G4DynamicParticle objects
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G4DynamicParticle
*
pip
=
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new
G4DynamicParticle
(
G4PionPlus::PionPlus
(),dir,tkin);
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G4DynamicParticle
* pin =
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new
G4DynamicParticle
(
G4PionMinus::PionMinus
(),-dir,tkin);
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newp->push_back(pip);
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newp->push_back(pin);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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geant4
tree
geant4-10.6-release
source
processes
electromagnetic
highenergy
src
G4eeToTwoPiModel.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:31
using
1.8.2 with
ECCE GitHub integration