Antinucleon-nucleon interaction from chiral effective field theory and its application to neutron-antineutron oscillations
1 Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany
2 Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany
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Published online: 27 April 2022
An $\bar N$N¯N potential is reviewed which has been derived within chiral effective field theory by the Jülich-Bonn group. By construction it reproduces $\bar N$N¯N phase shifts and inelasticities, provided by an elaborate phase-shift analysis of available $\bar p$p¯p scattering data. This interaction is then employed in a study of neutron-antineutron oscillations in the deuteron. In particular, the deuteron lifetime is considered, and results for it are presented in terms of the free-space n – $\bar n$n¯ oscillation time, based on that $\bar N$N¯N potential in combination with an NN interaction likewise derived within chiral effective field theory.
© The Authors, published by EDP Sciences, 2022
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