Physics constructor that replaces the built-in Geant4 electronNuclear process with the GENIE-based GenieElectroNuclearProcess. More...

#include <GenieNuclearPhysics.h>

Public Member Functions
	GenieNuclearPhysics (const framework::config::Parameters &params)
	Constructor.

void	ConstructParticle () override
	No new particles to construct.

void	ConstructProcess () override
	Remove the built-in electronNuclear process and register the GENIE-based replacement.

Static Public Attributes
static const std::string	NAME = "GenieNuclear"
	Name of this physics constructor.

Private Attributes
framework::config::Parameters	params_
	Stored configuration to forward to the process.

bool	enable_
	Is the GENIE process enabled?

Detailed Description

Physics constructor that replaces the built-in Geant4 electronNuclear process with the GENIE-based GenieElectroNuclearProcess.

Follows the same pattern as APrimePhysics. Registered with the physics list in RunManager::setupPhysics().

Definition at line 24 of file GenieNuclearPhysics.h.

Constructor & Destructor Documentation

◆ GenieNuclearPhysics()

simcore::GenieNuclearPhysics::GenieNuclearPhysics ( const framework::config::Parameters & params )

Constructor.

Parameters

params Configuration parameters forwarded to the process

Definition at line 17 of file GenieNuclearPhysics.cxx.

    : G4VPhysicsConstructor(NAME), params_{params} {
  enable_ = params_.get<bool>("enable", false);
}

References enable_, framework::config::Parameters::get(), and params_.

Member Function Documentation

◆ ConstructParticle()

void simcore::GenieNuclearPhysics::ConstructParticle ( )

override

No new particles to construct.

Definition at line 23 of file GenieNuclearPhysics.cxx.

                                            {
  // No new particles — we only replace an existing process
}

◆ ConstructProcess()

void simcore::GenieNuclearPhysics::ConstructProcess ( )

override

Remove the built-in electronNuclear process and register the GENIE-based replacement.

Definition at line 27 of file GenieNuclearPhysics.cxx.

                                           {
  if (!enable_) {
    ldmx_log(info) << "GENIE electronuclear process is not enabled";
    return;
  }
 
  ldmx_log(info) << "Setting up GENIE electronuclear process...";
 
  G4ProcessManager* process_manager =
      G4Electron::Definition()->GetProcessManager();
  if (!process_manager) {
    EXCEPTION_RAISE("GenieNuclearPhysics",
                    "Unable to access the electron process manager!");
  }
 
  // Find and remove the built-in electronNuclear process
  G4VProcess* existing =
      G4ProcessTable::GetProcessTable()->FindProcess("electronNuclear", "e-");
  if (existing) {
    ldmx_log(info) << "Removing built-in electronNuclear process";
    process_manager->RemoveProcess(existing);
  } else {
    ldmx_log(info)
        << "No built-in electronNuclear process found — adding GENIE process";
  }
 
  // Create and register the GENIE-based process
  auto* genie_process = new GenieElectroNuclearProcess(params_);
  process_manager->AddDiscreteProcess(genie_process);
 
  // Set ordering to first so biasing framework always sees it
  process_manager->SetProcessOrderingToFirst(genie_process,
                                             G4ProcessVectorDoItIndex::idxAll);
 
  ldmx_log(info) << "GENIE electronuclear process registered successfully";
}

References enable_, and params_.

Member Data Documentation

◆ enable_

bool simcore::GenieNuclearPhysics::enable_

private

Is the GENIE process enabled?

Definition at line 51 of file GenieNuclearPhysics.h.

Referenced by ConstructProcess(), and GenieNuclearPhysics().

◆ NAME

const std::string simcore::GenieNuclearPhysics::NAME = "GenieNuclear"

static

Name of this physics constructor.

Definition at line 27 of file GenieNuclearPhysics.h.

◆ params_

framework::config::Parameters simcore::GenieNuclearPhysics::params_

private

Stored configuration to forward to the process.

Definition at line 48 of file GenieNuclearPhysics.h.