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G4Eta.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4Eta.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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// ----------------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// History: first implementation, based on object model of
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// 4th April 1996, G.Cosmo
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// H.Kurashige 7 Jul 96
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// **********************************************************************
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// New impelemenataion as an utility class M.Asai, 26 July 2004
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// ----------------------------------------------------------------------
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// Update mass (PDG2006) Oct. 11 2006 H.Kurashige
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//
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#include "
G4Eta.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
G4ParticleTable.hh
"
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#include "
G4PhaseSpaceDecayChannel.hh
"
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#include "
G4DecayTable.hh
"
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// ######################################################################
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// ### ETA ###
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// ######################################################################
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G4Eta
*
G4Eta::theInstance
= 0;
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G4Eta
*
G4Eta::Definition
()
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{
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if
(
theInstance
!=0)
return
theInstance
;
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const
G4String
name
=
"eta"
;
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// search in particle table]
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G4ParticleTable
* pTable =
G4ParticleTable::GetParticleTable
();
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G4ParticleDefinition
* anInstance = pTable->
FindParticle
(name);
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if
(anInstance ==0)
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{
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// create particle
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//
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// Arguments for constructor are as follows
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// name mass width charge
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// 2*spin parity C-conjugation
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// 2*Isospin 2*Isospin3 G-parity
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// type lepton number baryon number PDG encoding
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// stable lifetime decay table
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// shortlived subType anti_encoding
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anInstance =
new
G4ParticleDefinition
(
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name, 0.547862*
GeV
, 1.31*
keV
, 0.0,
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0, -1, +1,
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0, 0, +1,
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"meson"
, 0, 0, 221,
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false
, 0.0*
ns
, NULL,
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false
,
"eta"
, 221);
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//create Decay Table
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G4DecayTable
* table =
new
G4DecayTable
();
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// create decay channels
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G4VDecayChannel
** mode =
new
G4VDecayChannel
*[4];
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// eta -> gamma + gamma
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mode[0] =
new
G4PhaseSpaceDecayChannel
(
"eta"
,0.3942,2,
"gamma"
,
"gamma"
);
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// eta -> pi0 + pi0 + pi0
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mode[1] =
new
G4PhaseSpaceDecayChannel
(
"eta"
,0.3256,3,
"pi0"
,
"pi0"
,
"pi0"
);
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// eta -> pi0 + pi+ + pi-
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mode[2] =
new
G4PhaseSpaceDecayChannel
(
"eta"
,0.226,3,
"pi0"
,
"pi+"
,
"pi-"
);
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// eta -> gamma + pi+ + pi-
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mode[3] =
new
G4PhaseSpaceDecayChannel
(
"eta"
,0.0468,3,
"gamma"
,
"pi+"
,
"pi-"
);
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for
(
G4int
index=0; index <4; index++ ) table->
Insert
(mode[index]);
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delete
[] mode;
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anInstance->
SetDecayTable
(table);
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}
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theInstance
=
reinterpret_cast<
G4Eta
*
>
(anInstance);
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return
theInstance
;
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}
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G4Eta
*
G4Eta::EtaDefinition
()
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{
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return
Definition
();
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}
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G4Eta
*
G4Eta::Eta
()
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{
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return
Definition
();
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}
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geant4
tree
geant4-10.6-release
source
particles
hadrons
mesons
src
G4Eta.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:23
using
1.8.2 with
ECCE GitHub integration