Gabriele Cosmo
529 lines
14 KiB
C++
529 lines
14 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4ExcitedDeltaConstructor.cc,v 1.8 2004/02/13 05:54:07 kurasige Exp $
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// GEANT4 tag $Name: geant4-07-00-cand-01 $
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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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// 10 oct 1998 H.Kurashige
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// ---------------------------------------------------------------
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#include "G4ExcitedDeltaConstructor.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4ParticleTable.hh"
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#include "G4ShortLivedTable.hh"
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#include "G4PhaseSpaceDecayChannel.hh"
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#include "G4VDecayChannel.hh"
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#include "G4DecayTable.hh"
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G4ExcitedDeltaConstructor::G4ExcitedDeltaConstructor():
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G4ExcitedBaryonConstructor(NStates, DeltaIsoSpin)
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{
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}
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G4ExcitedDeltaConstructor::~G4ExcitedDeltaConstructor()
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{
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}
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G4int G4ExcitedDeltaConstructor::GetEncoding(G4int iIsoSpin3, G4int idxState)
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{
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G4int encoding;
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// Delta has exceptinal encoding
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if ((idxState==1)||(idxState==3)||(idxState==4)||(idxState==5)||(idxState==7)) {
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encoding = GetEncodingOffset(idxState);
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if ((iIsoSpin3==3)||(iIsoSpin3==-3)) {
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// normal encoding
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encoding += 1000*GetQuarkContents(0, iIsoSpin3);
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encoding += 100*GetQuarkContents(1, iIsoSpin3);
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encoding += 10*GetQuarkContents(2, iIsoSpin3);
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} else if (iIsoSpin3== +1){
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// 1st <--> 2nd quark
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encoding += 1000*GetQuarkContents(0, iIsoSpin3);
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encoding += 10*GetQuarkContents(1, iIsoSpin3);
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encoding += 100*GetQuarkContents(2, iIsoSpin3);
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} else if (iIsoSpin3== -1){
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// 1st <--> 0th quark
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encoding += 100*GetQuarkContents(0, iIsoSpin3);
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encoding += 1000*GetQuarkContents(1, iIsoSpin3);
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encoding += 10*GetQuarkContents(2, iIsoSpin3);
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}
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encoding += GetiSpin(idxState) +1;
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} else {
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encoding = G4ExcitedBaryonConstructor::GetEncoding(iIsoSpin3, idxState);
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}
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return encoding;
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}
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G4DecayTable* G4ExcitedDeltaConstructor::CreateDecayTable(
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const G4String& parentName,
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G4int iIso3,
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G4int iState,
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G4bool fAnti)
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{
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// create decay table
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G4DecayTable* decayTable = new G4DecayTable();
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G4double br;
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if ( (br=bRatio[iState][NGamma]) >0.0) {
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AddNGammaMode( decayTable, parentName, br, iIso3, fAnti);
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}
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if ( (br=bRatio[iState][NPi]) >0.0) {
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AddNPiMode( decayTable, parentName, br, iIso3, fAnti);
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}
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if ( (br=bRatio[iState][NRho]) >0.0) {
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AddNRhoMode( decayTable, parentName, br, iIso3, fAnti);
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}
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if ( (br=bRatio[iState][DeltaPi]) >0.0) {
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AddDeltaPiMode( decayTable, parentName, br, iIso3, fAnti);
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}
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if ( (br=bRatio[iState][NStarPi]) >0.0) {
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AddNStarPiMode( decayTable, parentName, br, iIso3, fAnti);
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}
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return decayTable;
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}
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G4DecayTable* G4ExcitedDeltaConstructor::AddNGammaMode(
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G4DecayTable* decayTable, const G4String& nameParent,
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G4double br, G4int iIso3, G4bool fAnti)
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{
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G4VDecayChannel* mode;
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//
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G4String daughterN;
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if (iIso3 == +1) {
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daughterN = "proton";
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} else if (iIso3 == -1) {
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daughterN = "neutron";
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} else {
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// can not decay into N+gamma
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return decayTable;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, br, 2,
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daughterN,"gamma");
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// add decay table
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decayTable->Insert(mode);
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return decayTable;
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}
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G4DecayTable* G4ExcitedDeltaConstructor::AddNPiMode(
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G4DecayTable* decayTable, const G4String& nameParent,
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G4double br, G4int iIso3, G4bool fAnti)
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{
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G4VDecayChannel* mode;
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G4String daughterN;
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G4String daughterPi;
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G4double r = 0.;
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// ------------ N pi0 ------------
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// determine daughters
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if ((iIso3 == +1)||(iIso3 == -1)) {
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if (iIso3 == +1) {
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daughterN = "proton";
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daughterPi = "pi0";
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r = br*2./3.;
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} else if (iIso3 == -1) {
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daughterN = "neutron";
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daughterPi = "pi0";
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r = br/3.;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterN,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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}
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// -------------N pi +/- --------------
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// determine daughters
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if (iIso3 == +3) {
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daughterN = "proton";
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if (!fAnti) {
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daughterPi = "pi+";
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} else {
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daughterPi = "pi-";
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}
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r = br;
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} else if (iIso3 == +1) {
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daughterN = "neutron";
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if (!fAnti) {
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daughterPi = "pi+";
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} else {
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daughterPi = "pi-";
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}
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r = br/3.;
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} else if (iIso3 == -1) {
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daughterN = "proton";
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if (!fAnti) {
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daughterPi = "pi-";
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} else {
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daughterPi = "pi+";
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}
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r = br*2./3.;
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} else if (iIso3 == -3) {
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daughterN = "neutron";
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if (!fAnti) {
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daughterPi = "pi-";
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} else {
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daughterPi = "pi+";
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}
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r = br;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterN,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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return decayTable;
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}
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G4DecayTable* G4ExcitedDeltaConstructor::AddNRhoMode(
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G4DecayTable* decayTable, const G4String& nameParent,
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G4double br, G4int iIso3, G4bool fAnti)
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{
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G4VDecayChannel* mode;
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G4String daughterN;
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G4String daughterRho;
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G4double r = 0.;
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// ------------ N Rho0 ------------
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// determine daughters
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if ((iIso3 == +1)||(iIso3 == -1)) {
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if (iIso3 == +1) {
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daughterN = "proton";
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daughterRho = "rho0";
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r = br*2./3.;
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} else if (iIso3 == -1) {
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daughterN = "neutron";
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daughterRho = "rho0";
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r = br/3.;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterN,daughterRho);
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// add decay table
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decayTable->Insert(mode);
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}
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// -------------N Rho +/- --------------
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// determine daughters
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if (iIso3 == +3) {
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daughterN = "proton";
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if (!fAnti) {
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daughterRho = "rho+";
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} else {
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daughterRho = "rho-";
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}
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r = br;
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} else if (iIso3 == +1) {
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daughterN = "neutron";
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if (!fAnti) {
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daughterRho = "rho+";
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} else {
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daughterRho = "rho-";
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}
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r = br/3.;
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} else if (iIso3 == -1) {
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daughterN = "proton";
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if (!fAnti) {
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daughterRho = "rho-";
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} else {
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daughterRho = "rho+";
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}
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r = br*2./3.;
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} else if (iIso3 == -3) {
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daughterN = "neutron";
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if (!fAnti) {
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daughterRho = "rho-";
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} else {
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daughterRho = "rho+";
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}
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r = br;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterN,daughterRho);
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// add decay table
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decayTable->Insert(mode);
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return decayTable;
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}
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G4DecayTable* G4ExcitedDeltaConstructor::AddNStarPiMode(
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G4DecayTable* decayTable, const G4String& nameParent,
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G4double br, G4int iIso3, G4bool fAnti)
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{
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G4VDecayChannel* mode;
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G4String daughterN;
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G4String daughterPi;
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G4double r = 0.;
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// ------------ N pi0 ------------
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// determine daughters
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if ((iIso3 == +1)||(iIso3 == -1)) {
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if (iIso3 == +1) {
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daughterN = "N(1440)+";
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daughterPi = "pi0";
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r = br*2./3.;
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} else if (iIso3 == -1) {
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daughterN = "N(1440)0";
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daughterPi = "pi0";
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r = br/3.;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterN,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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}
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// -------------N pi +/- --------------
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// determine daughters
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if (iIso3 == +3) {
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daughterN = "N(1440)+";
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if (!fAnti) {
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daughterPi = "pi+";
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} else {
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daughterPi = "pi-";
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}
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r = br;
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} else if (iIso3 == +1) {
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daughterN = "N(1440)0";
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if (!fAnti) {
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daughterPi = "pi+";
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} else {
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daughterPi = "pi-";
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}
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r = br/3.;
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} else if (iIso3 == -1) {
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daughterN = "N(1440)+";
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if (!fAnti) {
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daughterPi = "pi-";
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} else {
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daughterPi = "pi+";
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}
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r = br*2./3.;
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} else if (iIso3 == -3) {
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daughterN = "N(1440)0";
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if (!fAnti) {
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daughterPi = "pi-";
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} else {
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daughterPi = "pi+";
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}
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r = br;
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}
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if (fAnti) daughterN = "anti_" + daughterN;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterN,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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return decayTable;
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}
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G4DecayTable* G4ExcitedDeltaConstructor::AddDeltaPiMode(
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G4DecayTable* decayTable, const G4String& nameParent,
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G4double br, G4int iIso3, G4bool fAnti)
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{
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G4VDecayChannel* mode;
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G4String daughterDelta;
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G4String daughterPi;
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G4double r;
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// ------------ Delta pi +------------
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// determine daughters
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if (iIso3 == +3) {
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daughterDelta = "delta+";
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r = br*0.4;
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} else if (iIso3 == +1) {
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daughterDelta = "delta0";
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r = br*8./15.0;
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} else if (iIso3 == -1) {
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daughterDelta = "delta-";
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r = br*6./15.;
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} else {
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r = 0.;
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}
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if (!fAnti) {
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daughterPi = "pi+";
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} else {
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daughterPi = "pi-";
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}
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if (fAnti) daughterDelta = "anti_" + daughterDelta;
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if (r>0.0) {
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterDelta,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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}
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// ------------ Delta pi0 ------------
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// determine daughters
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if (iIso3 == +3) {
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daughterDelta = "delta++";
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r = br*0.6;
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} else if (iIso3 == +1) {
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daughterDelta = "delta+";
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r = br*1./15.0;
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} else if (iIso3 == -1) {
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daughterDelta = "delta0";
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r = br*1./15.;
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} else {
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daughterDelta = "delta-";
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r = br*0.6;
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}
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daughterPi = "pi0";
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if (fAnti) daughterDelta = "anti_" + daughterDelta;
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterDelta,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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// ------------ Delta pi - -------------
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// determine daughters
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if (iIso3 == +3) {
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r= 0.;
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} else if (iIso3 == +1) {
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daughterDelta = "delta++";
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r = br*6./15.0;
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} else if (iIso3 == -1) {
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daughterDelta = "delta+";
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r = br*8./15.;
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} else {
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daughterDelta = "delta0";
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r = br*0.4;
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}
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if (!fAnti) {
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daughterPi = "pi-";
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} else {
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daughterPi = "pi+";
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}
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if (fAnti) daughterDelta = "anti_" + daughterDelta;
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if (r>0.0) {
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// create decay channel [parent BR #daughters]
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mode = new G4PhaseSpaceDecayChannel(nameParent, r, 2,
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daughterDelta,daughterPi);
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// add decay table
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decayTable->Insert(mode);
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}
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return decayTable;
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}
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const char* G4ExcitedDeltaConstructor::name[] =
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{
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"delta(1600)", "delta(1620)", "delta(1700)", "delta(1900)", "delta(1905)",
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"delta(1910)", "delta(1920)", "delta(1930)", "delta(1950)"
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};
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const G4double G4ExcitedDeltaConstructor::mass[] =
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{
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1.600*GeV, 1.620*GeV, 1.700*GeV, 1.840*GeV, 1.905*GeV,
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1.910*GeV, 1.920*GeV, 1.930*GeV, 1.950*GeV
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};
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const G4double G4ExcitedDeltaConstructor::width[] = {
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350.0*MeV, 150.0*MeV, 300.0*MeV, 260.0*MeV, 350.0*MeV,
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250.0*MeV, 200.0*MeV, 350.0*MeV, 300.0*MeV
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};
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const G4int G4ExcitedDeltaConstructor::iSpin[] =
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{
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3, 1, 3, 1, 5,
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1, 3, 5, 7
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};
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const G4int G4ExcitedDeltaConstructor::iParity[] = {
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+1, -1, -1, -1, +1,
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+1, +1, -1, +1
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};
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const G4int G4ExcitedDeltaConstructor::encodingOffset[] = {
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30000, 0, 10000, 10000, 0,
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20000, 20000, 10000, 0
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};
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const G4double G4ExcitedDeltaConstructor::bRatio[ G4ExcitedDeltaConstructor::NStates ][ G4ExcitedDeltaConstructor::NumberOfDecayModes] =
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{
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// NGamma Npi NRho DeltaPi N*Pi
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{ 0.0, 0.15, 0.0, 0.55, 0.30 },
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{ 0.0, 0.25, 0.0, 0.60, 0.15 },
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{ 0.0, 0.20, 0.10, 0.55, 0.15 },
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{ 0.0, 0.30, 0.15, 0.30, 0.25 },
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{ 0.0, 0.20, 0.60, 0.10, 0.10 },
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{ 0.0, 0.35, 0.40, 0.15, 0.10 },
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{ 0.0, 0.15, 0.30, 0.30, 0.25 },
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{ 0.0, 0.20, 0.25, 0.25, 0.30 },
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{ 0.01, 0.44, 0.15, 0.20, 0.20 }
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};
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