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Hadrons: Kl2 contraction using sequential propagators

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This commit is contained in:
Vera Guelpers 2018-12-14 13:45:30 +00:00
parent fa97a56fdd
commit 943fa48ce4
5 changed files with 256 additions and 1 deletions
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1
Hadrons/Modules.hpp
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@ -9,6 +9,7 @@
#include <Hadrons/Modules/MContraction/Gamma3pt.hpp>
#include <Hadrons/Modules/MContraction/WardIdentity.hpp>
#include <Hadrons/Modules/MContraction/WeakHamiltonianEye.hpp>
#include <Hadrons/Modules/MContraction/WeakMesonDecayKl2.hpp>
#include <Hadrons/Modules/MFermion/FreeProp.hpp>
#include <Hadrons/Modules/MFermion/GaugeProp.hpp>
#include <Hadrons/Modules/MSource/SeqGamma.hpp>

36
Hadrons/Modules/MContraction/WeakMesonDecayKl2.cc Normal file
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@ -0,0 +1,36 @@
/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: Hadrons/Modules/MContraction/WeakMesonDecayKl2.cc
Copyright (C) 2015-2018
Author: Antonin Portelli <antonin.portelli@me.com>
Author: Vera Guelpers <Vera.Guelpers@ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <Hadrons/Modules/MContraction/WeakMesonDecayKl2.hpp>
using namespace Grid;
using namespace Hadrons;
using namespace MContraction;
template class Grid::Hadrons::MContraction::TWeakMesonDecayKl2<FIMPL>;

213
Hadrons/Modules/MContraction/WeakMesonDecayKl2.hpp Normal file
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@ -0,0 +1,213 @@
/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: Hadrons/Modules/MContraction/WeakMesonDecayKl2.hpp
Copyright (C) 2015-2018
Author: Antonin Portelli <antonin.portelli@me.com>
Author: Vera Guelpers <Vera.Guelpers@ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#ifndef Hadrons_MContraction_WeakMesonDecayKl2_hpp_
#define Hadrons_MContraction_WeakMesonDecayKl2_hpp_
#include <Hadrons/Global.hpp>
#include <Hadrons/Module.hpp>
#include <Hadrons/ModuleFactory.hpp>
#include <Hadrons/Modules/MContraction/WeakHamiltonianNonEye.hpp>
BEGIN_HADRONS_NAMESPACE
/*
* Kl2 contraction
* -----------------------------
*
* contraction for Kl2 decay, including the lepton
*
* trace(q1*adj(q2)*g5*gL[mu]) * (gL[mu] * lepton)_{a,b}
*
* with open spinor indices (a,b) for the lepton part
*
* q1 lepton
* /------------\ /------------
* / \ /
* / \H_W/
* g_5 * * *
* \ /
* \ /
* \____________/
* q2
*
* * options:
* - q1: input propagator 1 (string)
* - q2: input propagator 2 (string)
* - lepton: input lepton (string)
*/
/******************************************************************************
* TWeakMesonDecayKl2 *
******************************************************************************/
BEGIN_MODULE_NAMESPACE(MContraction)
class WeakMesonDecayKl2Par: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(WeakMesonDecayKl2Par,
std::string, q1,
std::string, q2,
std::string, lepton,
std::string, output);
};
template <typename FImpl>
class TWeakMesonDecayKl2: public Module<WeakMesonDecayKl2Par>
{
public:
FERM_TYPE_ALIASES(FImpl,);
class Result: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(Result,
int, spinidx1,
int, spinidx2,
std::vector<Complex>, corr);
};
public:
// constructor
TWeakMesonDecayKl2(const std::string name);
// destructor
virtual ~TWeakMesonDecayKl2(void) {};
// dependencies/products
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
protected:
// execution
virtual void setup(void);
// execution
virtual void execute(void);
};
MODULE_REGISTER_TMP(WeakMesonDecayKl2, ARG(TWeakMesonDecayKl2<FIMPL>), MContraction);
/******************************************************************************
* TWeakMesonDecayKl2 implementation *
******************************************************************************/
// constructor /////////////////////////////////////////////////////////////////
template <typename FImpl>
TWeakMesonDecayKl2<FImpl>::TWeakMesonDecayKl2(const std::string name)
: Module<WeakMesonDecayKl2Par>(name)
{}
// dependencies/products ///////////////////////////////////////////////////////
template <typename FImpl>
std::vector<std::string> TWeakMesonDecayKl2<FImpl>::getInput(void)
{
std::vector<std::string> input = {par().q1, par().q2, par().lepton};
return input;
}
template <typename FImpl>
std::vector<std::string> TWeakMesonDecayKl2<FImpl>::getOutput(void)
{
std::vector<std::string> output = {};
return output;
}
// setup ////////////////////////////////////////////////////////////////////////
template <typename FImpl>
void TWeakMesonDecayKl2<FImpl>::setup(void)
{
envTmpLat(LatticeComplex, "c");
envTmpLat(PropagatorField, "prop_buf");
envCreateLat(PropagatorField, getName());
envTmpLat(LatticeComplex, "buf");
}
// execution ///////////////////////////////////////////////////////////////////
template <typename FImpl>
void TWeakMesonDecayKl2<FImpl>::execute(void)
{
LOG(Message) << "Computing QED Kl2 contractions '" << getName() << "' using"
<< " quarks '" << par().q1 << "' and '" << par().q2 << "' and"
<< "lepton '" << par().lepton << "'" << std::endl;
auto &res = envGet(PropagatorField, getName()); res = zero;
Gamma g5(Gamma::Algebra::Gamma5);
int nt = env().getDim(Tp);
auto &q1 = envGet(PropagatorField, par().q1);
auto &q2 = envGet(PropagatorField, par().q2);
auto &lepton = envGet(PropagatorField, par().lepton);
envGetTmp(LatticeComplex, buf);
std::vector<TComplex> res_summed;
envGetTmp(LatticeComplex, c);
envGetTmp(PropagatorField, prop_buf);
std::vector<Result> result;
result.resize(Ns*Ns);
for (unsigned int i = 0; i < Ns*Ns ; ++i)
{
result[i].corr.resize(nt);
}
for (unsigned int mu = 0; mu < 4; ++mu)
{
c = zero;
//hadronic part: trace(q1*adj(q2)*g5*gL[mu])
c = trace(MAKE_CW_SUBDIAG(q1, q2, GammaL(Gamma::gmu[mu])));
prop_buf = 1.;
//multiply lepton part
res += c * prop_buf * GammaL(Gamma::gmu[mu]) * lepton;
}
//loop over spinor index of lepton part
unsigned int i = 0;
for (unsigned int s1 = 0; s1 < Ns ; ++s1)
for (unsigned int s2 = 0; s2 < Ns ; ++s2)
{
buf = peekColour(peekSpin(res,s1,s2),0,0);
sliceSum(buf, res_summed, Tp);
for (unsigned int t = 0; t < nt; ++t)
{
result[i].corr[t] = TensorRemove(res_summed[t]);
}
result[i].spinidx1 = s1;
result[i].spinidx2 = s2;
i+=1;
}
saveResult(par().output, "weakdecay", result);
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_MContraction_WeakMesonDecayKl2_hpp_

5
Hadrons/Modules/MFermion/FreeProp.hpp
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@ -168,7 +168,10 @@ void TFreeProp<FImpl>::execute(void)
}
sol = zero;
std::vector<double> twist = strToVec<double>(par().twist);
if(twist.size() != Nd) HADRONS_ERROR(Size, "number of twist angles does not match number of dimensions");
if(twist.size() != Nd)
{
HADRONS_ERROR(Size, "number of twist angles does not match number of dimensions");
}
mat.FreePropagator(source,sol,mass,twist);
FermToProp<FImpl>(prop, sol, s, c);
// create 4D propagators from 5D one if necessary

2
Hadrons/modules.inc
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@ -4,6 +4,7 @@ modules_cc =\
Modules/MContraction/Meson.cc \
Modules/MContraction/WeakNeutral4ptDisc.cc \
Modules/MContraction/WeakHamiltonianNonEye.cc \
Modules/MContraction/WeakMesonDecayKl2.cc \
Modules/MContraction/A2AAslashField.cc \
Modules/MContraction/WardIdentity.cc \
Modules/MContraction/A2AMesonField.cc \
@ -83,6 +84,7 @@ modules_hpp =\
Modules/MContraction/Gamma3pt.hpp \
Modules/MContraction/WardIdentity.hpp \
Modules/MContraction/WeakHamiltonianEye.hpp \
Modules/MContraction/WeakMesonDecayKl2.hpp \
Modules/MFermion/FreeProp.hpp \
Modules/MFermion/GaugeProp.hpp \
Modules/MSource/SeqGamma.hpp \