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Parity violation in neutron capture on the proton: Determining the weak pion–nucleon coupling

By Germany D-52425 Jülich Forschungszentrum Jülich Jülich Center for Hadron Physics Institut für Kernphysik J.Institute for Advanced Simulation de Vries, Germany) D-52425 Jülich Forschungszentrum Jülich Jülich Center for Hadron Physics Institut für Kernphysik N.(Institute for Advanced Simulation Li, Germany) D-52425 Jülich Forschungszentrum Jülich Jülich Center for Hadron Physics Institut für Kernphysik Ulf-G.(Institute for Advanced Simulation Meißner, Germany) D-52425 Jülich Forschungszentrum Jülich Jülich Center for Hadron Physics Institut für Kernphysik A.(Institute for Advanced Simulation Nogga, Germany) 44780 Bochum Ruhr-Universität Bochum E.(Institut für Theoretische Physik II Epelbaum and Germany) D-85747 Garching Technische Universität München N.(Physik Department T39 Kaiser

Abstract

We investigate the parity-violating analyzing power in neutron capture on the proton at thermal energies in the framework of chiral effective field theory. By combining this analysis with a previous analysis of parity violation in proton–proton scattering, we are able to extract the size of the weak pion–nucleon coupling constant. The uncertainty is significant and dominated by the experimental error which is expected to be reduced soon

Year: 2015
DOI identifier: 10.1016/j.physletb.2015.05.074
OAI identifier: oai:www.openaccessrepository.it:12229

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