MARLEY (Model of Argon Reaction Low Energy Yields)  v1.1.0
A Monte Carlo event generator for tens-of-MeV neutrino-nucleus interactions in liquid argon
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marley::FermiDiracNeutrinoSource Class Reference

Supernova cooling neutrino source approximated using a Fermi-Dirac distribution. More...

#include <NeutrinoSource.hh>

Inheritance diagram for marley::FermiDiracNeutrinoSource:
marley::NeutrinoSource

Public Member Functions

 FermiDiracNeutrinoSource (int particle_id=marley_utils::ELECTRON_NEUTRINO, double Emin=0., double Emax=50., double temp=3.5, double eta=0.)
 
virtual double get_Emax () const override
 Get the maximum neutrino energy (MeV) that can be sampled by this source.
 
virtual double get_Emin () const override
 Get the minimum neutrino energy (MeV) that can be sampled by this source.
 
virtual double pdf (double E) override
 Probability density function describing the incident neutrino energy distribution. More...
 
- Public Member Functions inherited from marley::NeutrinoSource
 NeutrinoSource (int particle_id)
 
virtual int get_pid () const
 Get the PDG particle ID for the neutrino type produced by this source.
 
virtual double sample_incident_neutrino (int &pdg, marley::Generator &gen)
 Samples an incident neutrino energy and loads pdg with the PDG code of the appropriate neutrino type. More...
 

Protected Attributes

double C_
 normalization constant (MeV2)
 
double Emax_
 maximum neutrino energy (MeV)
 
double Emin_
 minimum neutrino energy (MeV)
 
double eta_
 dimensionless pinching parameter
 
double temperature_
 temperature (MeV)
 
- Protected Attributes inherited from marley::NeutrinoSource
int pid_
 PDG particle ID for the neutrinos produced by this source.
 

Additional Inherited Members

- Static Public Member Functions inherited from marley::NeutrinoSource
static bool pdg_is_allowed (const int pdg)
 

Detailed Description

Supernova cooling neutrino source approximated using a Fermi-Dirac distribution.

Neutrino energies from this source are sampled from a Fermi-Dirac distribution with temperature \(T\) (MeV) and pinching parameter \(\eta\). The probability density function is given by

\begin{align*} P(E) &= \frac{C\,E^2} {T^4\left[1+\exp\left(\frac{E}{T} - \eta\right)\right]} & \text{E}_\text{min} \leq E \leq \text{E}_\text{max} \end{align*}

where \(C\) is a normalization constant.

Constructor & Destructor Documentation

marley::FermiDiracNeutrinoSource::FermiDiracNeutrinoSource ( int  particle_id = marley_utils::ELECTRON_NEUTRINO,
double  Emin = 0.,
double  Emax = 50.,
double  temp = 3.5,
double  eta = 0. 
)
Parameters
particle_idPDG particle ID for the neutrinos produced by this source
Eminminimum allowed neutrino energy (MeV)
Emaxmaximum allowed neutrino energy (MeV)
temptemperature (MeV)
etapinching parameter
Todo:
Remove hard-coded number of integration subintervals in this function

Member Function Documentation

double marley::FermiDiracNeutrinoSource::pdf ( double  E)
overridevirtual

Probability density function describing the incident neutrino energy distribution.

The neutrino spectrum produced by this source will be folded with the relevant cross sections by a Generator object during event creation

Parameters
Eneutrino energy (MeV)
Returns
Probability density (MeV -1)

Implements marley::NeutrinoSource.


The documentation for this class was generated from the following files: