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93 lines
3.6 KiB
C++
93 lines
3.6 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: extras/Hadrons/Modules/MContraction/WeakHamiltonianEye.cc
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Copyright (C) 2017
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Author: Andrew Lawson <andrew.lawson1991@gmail.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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#include <Grid/Hadrons/Modules/MContraction/WeakHamiltonianEye.hpp>
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using namespace Grid;
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using namespace Hadrons;
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using namespace MContraction;
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/*
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* Weak Hamiltonian current-current contractions, Eye-type.
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*
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* These contractions are generated by the Q1 and Q2 operators in the physical
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* basis (see e.g. Fig 3 of arXiv:1507.03094).
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*
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* Schematics: q4 | q4
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* /-<-¬ | /-<-¬
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* / \ | / \
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* \ / | \ /
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* q2 \ / q3 | \_ _/
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* |-----<-----* *-----<----¬ | q2 * q3
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* i * H_W * f | |-----<------*------<----¬
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* \ / | i * H_W * f
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* \ / | \ /
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* \---------->---------/ | \------------>---------/
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* q1 | q1
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* |
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* Saucer (S) | Eye (E)
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*
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* S: trace(q3*g5*q1*adj(q2)*g5*gL[mu][p_1]*q4*gL[mu][p_2])
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* E: trace(q3*g5*q1*adj(q2)*g5*gL[mu][p_1])*trace(q4*gL[mu][p_2])
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*/
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/******************************************************************************
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* TWeakHamiltonianEye implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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TWeakHamiltonianEye::TWeakHamiltonianEye(const std::string name)
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: Module<WeakHamiltonianPar>(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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std::vector<std::string> TWeakHamiltonianEye::getInput(void)
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{
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std::vector<std::string> in;
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return in;
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}
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std::vector<std::string> TWeakHamiltonianEye::getOutput(void)
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{
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std::vector<std::string> out = {getName()};
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return out;
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}
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// setup ///////////////////////////////////////////////////////////////////////
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void TWeakHamiltonianEye::setup(void)
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{
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}
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// execution ///////////////////////////////////////////////////////////////////
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void TWeakHamiltonianEye::execute(void)
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{
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}
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