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Herwig
7.2.1
Shower
QTilde
SplittingFunctions
CMWHalfHalfOneSplitFn.h
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// -*- C++ -*-
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//
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// CMWHalfHalfOneSplitFn.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_CMWHalfHalfOneSplitFn_H
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#define HERWIG_CMWHalfHalfOneSplitFn_H
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//
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// This is the declaration of the CMWHalfHalfOneSplitFn class.
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//
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#include "HalfHalfOneSplitFn.h"
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#include "Herwig/Shower/ShowerAlpha.h"
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namespace
Herwig
{
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using namespace
ThePEG
;
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class
CMWHalfHalfOneSplitFn
:
public
HalfHalfOneSplitFn
{
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public
:
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virtual
double
P(
const
double
z,
const
Energy2 t,
const
IdList
& ids,
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const
bool
mass,
const
RhoDMatrix
& rho)
const
;
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virtual
double
ratioP(
const
double
z,
const
Energy2 t,
const
IdList
& ids,
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const
bool
mass,
const
RhoDMatrix
& rho)
const
;
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double
Kg
(Energy2 )
const
{
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//TODO: Should be t-dependent
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int
Nf=5;
//alpha_->Nf(t)
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return
(3.*(67./18.-1./6.*
sqr
(Constants::pi))-5./9.*Nf);
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}
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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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virtual
void
doinit
(){
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HalfHalfOneSplitFn::doinit
();
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};
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private
:
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// Pointer to the alpha_s object in use.
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ShowerAlphaPtr alpha_;
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// Provide information if the kernel is used for initial state.
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// as the pt definition contains an additional factor of z.
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bool
isIS_=
false
;
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protected
:
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virtual
IBPtr
clone
()
const
{
return
new_ptr(*
this
);}
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virtual
IBPtr
fullclone
()
const
{
return
new_ptr(*
this
);}
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private
:
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CMWHalfHalfOneSplitFn
& operator=(
const
CMWHalfHalfOneSplitFn
&) =
delete
;
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};
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}
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#endif
/* HERWIG_CMWHalfHalfOneSplitFn_H */
ThePEG::PersistentIStream
Herwig::CMWHalfHalfOneSplitFn::clone
virtual IBPtr clone() const
Make a simple clone of this object.
Definition:
CMWHalfHalfOneSplitFn.h:136
Herwig::CMWHalfHalfOneSplitFn::doinit
virtual void doinit()
Initialize this object after the setup phase before saving an EventGenerator to disk.
Definition:
CMWHalfHalfOneSplitFn.h:114
ThePEG::PersistentOStream
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
sqr
constexpr auto sqr(const T &x) -> decltype(x *x)
ThePEG
Herwig::IdList
vector< tcPDPtr > IdList
Definition of the IdList for branchings.
Definition:
ShowerConfig.h:64
Herwig::CMWHalfHalfOneSplitFn::Kg
double Kg(Energy2) const
Return the correction term from: Nucl.Phys.
Definition:
CMWHalfHalfOneSplitFn.h:70
Herwig::HalfHalfOneSplitFn
This class provides the concrete implementation of the exact leading-order splitting function for ...
Definition:
HalfHalfOneSplitFn.h:39
Herwig::SplittingFunction::doinit
virtual void doinit()
Initialize this object after the setup phase before saving an EventGenerator to disk.
Herwig::CMWHalfHalfOneSplitFn::fullclone
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Definition:
CMWHalfHalfOneSplitFn.h:142
Herwig::CMWHalfHalfOneSplitFn
This class provides the concrete implementation of the CMW enhanced expressions for the splitting fun...
Definition:
CMWHalfHalfOneSplitFn.h:39
Herwig
-*- C++ -*-
Definition:
BasicConsistency.h:17
ThePEG::RhoDMatrix
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