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Herwig
7.2.1
Decay
FormFactors
BtoSGammaHadronicMass.h
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// -*- C++ -*-
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//
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// BtoSGammaHadronicMass.h is a part of Herwig - A multi-purpose Monte Carlo event generator
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// Copyright (C) 2002-2019 The Herwig Collaboration
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//
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// Herwig is licenced under version 3 of the GPL, see COPYING for details.
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// Please respect the MCnet academic guidelines, see GUIDELINES for details.
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//
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#ifndef HERWIG_BtoSGammaHadronicMass_H
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#define HERWIG_BtoSGammaHadronicMass_H
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//
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// This is the declaration of the BtoSGammaHadronicMass class.
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//
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#include "ThePEG/Interface/Interfaced.h"
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#include "BtoSGammaHadronicMass.fh"
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namespace
Herwig
{
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using namespace
ThePEG
;
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class
BtoSGammaHadronicMass
:
public
Interfaced
{
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public
:
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BtoSGammaHadronicMass
() : _minMass(825*MeV),_maxMass(5300*MeV) {}
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virtual
Energy hadronicMass(Energy mb,Energy mquark) =0;
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virtual
void
dataBaseOutput(ofstream & os,
bool
header,
bool
create)
const
;
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public
:
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void
persistentOutput(
PersistentOStream
& os)
const
;
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void
persistentInput(
PersistentIStream
& is,
int
version);
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static
void
Init();
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protected
:
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Energy
minMass
()
const
{
return
_minMass;}
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Energy
maxMass
()
const
{
return
_maxMass;}
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InvEnergy
exponentialFermiFunction
(Energy scale,Energy lambda,
double
a,
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InvEnergy norm,Energy2 lambda1 )
const
{
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double
x(scale/lambda);
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return
norm*
pow
(1.-x,a)*exp(-3.*
sqr
(lambda)/lambda1*x);
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}
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private
:
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BtoSGammaHadronicMass
& operator=(
const
BtoSGammaHadronicMass
&) =
delete
;
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private
:
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Energy
_minMass
;
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Energy
_maxMass
;
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};
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}
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#endif
/* HERWIG_BtoSGammaHadronicMass_H */
ThePEG::PersistentIStream
Herwig::BtoSGammaHadronicMass::_minMass
Energy _minMass
The minimum value of the hadronic mass.
Definition:
BtoSGammaHadronicMass.h:134
pow
constexpr double pow(double x, ExponentT p)
Herwig::BtoSGammaHadronicMass
The BtoSGammaHadronicMass class is the base class for the implementation of models of the hadronic ma...
Definition:
BtoSGammaHadronicMass.h:34
Herwig::BtoSGammaHadronicMass::BtoSGammaHadronicMass
BtoSGammaHadronicMass()
The default constructor.
Definition:
BtoSGammaHadronicMass.h:41
ThePEG::PersistentOStream
sqr
constexpr auto sqr(const T &x) -> decltype(x *x)
ThePEG
Herwig::BtoSGammaHadronicMass::maxMass
Energy maxMass() const
Maximum mass.
Definition:
BtoSGammaHadronicMass.h:99
Herwig::BtoSGammaHadronicMass::_maxMass
Energy _maxMass
The maximum value of the hadronic mass.
Definition:
BtoSGammaHadronicMass.h:139
Herwig::BtoSGammaHadronicMass::minMass
Energy minMass() const
Minimum mass.
Definition:
BtoSGammaHadronicMass.h:94
ThePEG::Interfaced
Herwig
-*- C++ -*-
Definition:
BasicConsistency.h:17
Herwig::BtoSGammaHadronicMass::exponentialFermiFunction
InvEnergy exponentialFermiFunction(Energy scale, Energy lambda, double a, InvEnergy norm, Energy2 lambda1) const
Exponential function of the form, , where taken from hep-ph/9805303.
Definition:
BtoSGammaHadronicMass.h:114
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