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138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: extras/Hadrons/Modules/MContraction/Meson.hpp
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Copyright (C) 2015
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Copyright (C) 2016
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Author: Antonin Portelli <antonin.portelli@me.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef Hadrons_Meson_hpp_
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#define Hadrons_Meson_hpp_
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#include <Grid/Hadrons/Global.hpp>
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#include <Grid/Hadrons/Module.hpp>
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#include <Grid/Hadrons/ModuleFactory.hpp>
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BEGIN_HADRONS_NAMESPACE
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/******************************************************************************
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* TMeson *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MContraction)
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class MesonPar: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(MesonPar,
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std::string, q1,
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std::string, q2,
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std::string, output,
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Gamma::Algebra, gammaSource,
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Gamma::Algebra, gammaSink);
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};
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template <typename FImpl1, typename FImpl2>
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class TMeson: public Module<MesonPar>
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{
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public:
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TYPE_ALIASES(FImpl1, 1);
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TYPE_ALIASES(FImpl2, 2);
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class Result: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(Result, std::vector<Complex>, corr);
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};
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public:
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// constructor
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TMeson(const std::string name);
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// destructor
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virtual ~TMeson(void) = default;
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// dependencies/products
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virtual std::vector<std::string> getInput(void);
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virtual std::vector<std::string> getOutput(void);
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// execution
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virtual void execute(void);
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};
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MODULE_REGISTER_NS(Meson, ARG(TMeson<FIMPL, FIMPL>), MContraction);
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/******************************************************************************
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* TMeson implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename FImpl1, typename FImpl2>
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TMeson<FImpl1, FImpl2>::TMeson(const std::string name)
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: Module<MesonPar>(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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template <typename FImpl1, typename FImpl2>
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std::vector<std::string> TMeson<FImpl1, FImpl2>::getInput(void)
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{
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std::vector<std::string> input = {par().q1, par().q2};
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return input;
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}
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template <typename FImpl1, typename FImpl2>
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std::vector<std::string> TMeson<FImpl1, FImpl2>::getOutput(void)
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{
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std::vector<std::string> output = {getName()};
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return output;
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}
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// execution ///////////////////////////////////////////////////////////////////
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template <typename FImpl1, typename FImpl2>
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void TMeson<FImpl1, FImpl2>::execute(void)
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{
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LOG(Message) << "Computing meson contractions '" << getName() << "' using"
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<< " quarks '" << par().q1 << "' and '" << par().q2 << "'"
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<< std::endl;
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XmlWriter writer(par().output);
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PropagatorField1 &q1 = *env().template getObject<PropagatorField1>(par().q1);
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PropagatorField2 &q2 = *env().template getObject<PropagatorField2>(par().q2);
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LatticeComplex c(env().getGrid());
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Gamma gSrc(par().gammaSource), gSnk(par().gammaSink);
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Gamma g5(Gamma::Algebra::Gamma5);
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std::vector<TComplex> buf;
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Result result;
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c = trace(gSnk*q1*adj(gSrc)*g5*adj(q2)*g5);
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sliceSum(c, buf, Tp);
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result.corr.resize(buf.size());
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for (unsigned int t = 0; t < buf.size(); ++t)
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{
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result.corr[t] = TensorRemove(buf[t]);
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}
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write(writer, "meson", result);
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}
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END_MODULE_NAMESPACE
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END_HADRONS_NAMESPACE
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#endif // Hadrons_Meson_hpp_
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