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95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
/*******************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: programs/Hadrons/CMeson.cc
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Copyright (C) 2015
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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
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directory.
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*******************************************************************************/
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#include <Grid/Hadrons/Modules/CMeson.hpp>
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using namespace Grid;
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using namespace QCD;
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using namespace Hadrons;
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/******************************************************************************
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* CMeson implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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CMeson::CMeson(const std::string name)
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: Module<CMesonPar>(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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std::vector<std::string> CMeson::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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std::vector<std::string> CMeson::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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void CMeson::execute(void)
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{
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LOG(Message) << "Computing meson contraction '" << 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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PropagatorField &q1 = *env().getObject<PropagatorField>(par().q1);
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PropagatorField &q2 = *env().getObject<PropagatorField>(par().q2);
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LatticeComplex c(env().getGrid());
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SpinMatrix g[Ns*Ns], g5;
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std::vector<TComplex> buf;
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Result result;
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unsigned int nt = env().getGrid()->GlobalDimensions()[Tp];
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g5 = makeGammaProd(Ns*Ns - 1);
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result.corr.resize(Ns*Ns);
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for (unsigned int i = 0; i < Ns*Ns; ++i)
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{
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g[i] = makeGammaProd(i);
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}
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for (unsigned int iSink = 0; iSink < Ns*Ns; ++iSink)
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{
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result.corr[iSink].resize(Ns*Ns);
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for (unsigned int iSrc = 0; iSrc < Ns*Ns; ++iSrc)
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{
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c = trace(g[iSink]*q1*g[iSrc]*g5*adj(q2)*g5);
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sliceSum(c, buf, Tp);
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result.corr[iSink][iSrc].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[iSink][iSrc][t] = TensorRemove(buf[t]);
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}
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}
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}
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write(writer, "meson", result);
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}
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