Import Geant4 11.4.1 source tree

source/physics_lists/constructors/hadron_elastic/History

@@ -6,6 +6,10 @@ It must **not** be used as a substitute for writing good git commit messages!
 
 -------------------------------------------------------------------------------
 
+## 2026-01-21 Vladimir Ivanchenko (phys-ctor-helastic-V11-03-01)
+- G4ChargeExchangePhysics, G4ChargeExchangemessenger - added two
+    different biasing factors for pions and kaons (urgent request of NA64).
+
 ## 2025-04-15 Vladimir Ivanchenko (phys-ctor-helastic-V11-03-00)
 - G4ChargeExchangePhysics - fixed usage of the messenger
 

source/physics_lists/constructors/hadron_elastic/include/G4ChargeExchangeMessenger.hh

@@ -35,8 +35,8 @@
 //----------------------------------------------------------------------------
 //
 
-#ifndef G4ChargeExchangeMessenger_h
-#define G4ChargeExchangeMessenger_h 1
+#ifndef G4CHARGEEXCHANGEMESSENGER_HH
+#define G4CHARGEEXCHANGEMESSENGER_HH
 
 #include "G4UImessenger.hh"
 #include "G4UIdirectory.hh"
@@ -62,6 +62,7 @@ private:
   G4ChargeExchangePhysics* theB;
 
   G4UIcmdWithADouble* fCmd;
+  G4UIcmdWithADouble* fCmd1;
   G4UIcmdWithADoubleAndUnit* lCmd;
   G4UIdirectory* aDir;
 };

source/physics_lists/constructors/hadron_elastic/include/G4ChargeExchangePhysics.hh

@@ -35,8 +35,8 @@
 //----------------------------------------------------------------------------
 //
 
-#ifndef G4ChargeExchangePhysics_h
-#define G4ChargeExchangePhysics_h 1
+#ifndef G4CHARGEEXCHANGEPHYSICS_HH
+#define G4CHARGEEXCHANGEPHYSICS_HH
 
 #include "globals.hh"
 #include "G4VPhysicsConstructor.hh"
@@ -55,8 +55,10 @@ public:
 
   void SetLowEnergyLimit(G4double val) { fLowEnergyLimit = val; }
 
-  void SetCrossSectionFactor(G4double val) { fXSFactor = val; }
+  void SetPionCrossSectionFactor(G4double val) { fXSFactorPi = val; }
 
+  void SetKaonCrossSectionFactor(G4double val) { fXSFactorK = val; }
+  
   G4ChargeExchangePhysics& operator=
   (const G4ChargeExchangePhysics& right) = delete;
   G4ChargeExchangePhysics(const G4ChargeExchangePhysics&) = delete;
@@ -66,10 +68,10 @@ private:
   G4ChargeExchangeMessenger* theMessenger;
   
   G4double fLowEnergyLimit;
-  G4double fXSFactor{1.0};
+  G4double fXSFactorPi{1.0};
+  G4double fXSFactorK{1.0};
 };
 
-
 #endif
 
 
@@ -77,5 +79,3 @@ private:
 
 
 
-
-

source/physics_lists/constructors/hadron_elastic/src/G4ChargeExchangeMessenger.cc

@@ -45,11 +45,16 @@ G4ChargeExchangeMessenger::G4ChargeExchangeMessenger(G4ChargeExchangePhysics* a)
   aDir = new G4UIdirectory("/physics_lists/cex/", false);
   aDir->SetGuidance("tailoring the hadronic charge exchange processes.");
 
-  fCmd = new G4UIcmdWithADouble("/physics_lists/cex/BiasFactor",this);
-  fCmd->SetGuidance("Charge exchange cross section factor");
+  fCmd = new G4UIcmdWithADouble("/physics_lists/cex/PionBiasFactor",this);
+  fCmd->SetGuidance("Pion charge exchange cross section factor");
   fCmd->AvailableForStates(G4State_PreInit);
   fCmd->SetToBeBroadcasted(false);
 
+  fCmd1 = new G4UIcmdWithADouble("/physics_lists/cex/KaonBiasFactor",this);
+  fCmd1->SetGuidance("Kaon charge exchange cross section factor");
+  fCmd1->AvailableForStates(G4State_PreInit);
+  fCmd1->SetToBeBroadcasted(false);
+  
   lCmd = new G4UIcmdWithADoubleAndUnit("/process/cex/LowEnergyLimit",this);
   lCmd->SetGuidance("Low-energy energy limit for charge exchange process");
   lCmd->SetParameterName("cexLowE",true);
@@ -61,14 +66,18 @@ G4ChargeExchangeMessenger::G4ChargeExchangeMessenger(G4ChargeExchangePhysics* a)
 G4ChargeExchangeMessenger::~G4ChargeExchangeMessenger()
 {
   delete fCmd;
+  delete fCmd1;
   delete lCmd;
   delete aDir;
 }
 
 void G4ChargeExchangeMessenger::SetNewValue(G4UIcommand* aComm, G4String aS)
 {
-  if (aComm == fCmd)
-    theB->SetCrossSectionFactor(fCmd->GetNewDoubleValue(aS));
-  else if (aComm == lCmd)
+  if (aComm == fCmd) {
+    theB->SetPionCrossSectionFactor(fCmd->GetNewDoubleValue(aS));
+  } else if (aComm == fCmd1) {
+    theB->SetKaonCrossSectionFactor(fCmd1->GetNewDoubleValue(aS));
+  } else if (aComm == lCmd) {
     theB->SetLowEnergyLimit(lCmd->GetNewDoubleValue(aS));
+  }
 }

source/physics_lists/constructors/hadron_elastic/src/G4ChargeExchangePhysics.cc

@@ -96,14 +96,15 @@ void G4ChargeExchangePhysics::ConstructProcess()
 {
   auto xs = new G4ChargeExchangeXS();
   xs->SetEnergyLimit(fLowEnergyLimit);
-  xs->SetCrossSectionFactor(fXSFactor);
-
+  xs->SetPionCrossSectionFactor(fXSFactorPi);
+  xs->SetKaonCrossSectionFactor(fXSFactorK);
+  
   auto model = new G4ChargeExchange(xs);
 
   if (G4HadronicParameters::Instance()->GetVerboseLevel() > 1) {
     G4cout << "### ChargeExchangePhysics Construct Processes with the model <" 
 	   << model->GetModelName() << "> and x-section <" 
-	   << xs->GetName() << ">  XSFactor=" << fXSFactor 
+	   << xs->GetName() << ">  XSFactorPi=" << fXSFactorPi << ", XSFactorK=" << fXSFactorK
 	   << G4endl;
   }