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arxiv: 1902.03395 · v2 · pith:LAUR6SRGnew · submitted 2019-02-09 · ✦ hep-ph

Meson-baryon Scattering in Extend-on-mass-shell scheme at mathcal{O}(p³)

Junxu Lu (1 , 2) , Lisheng Geng (1) , Xiulei Ren (3) , Menglin Du (4) ((1) Nuclear Energy Engineering , International Research Center for Nuclei , Particles in the Cosmos Beijing Key Laboratory of Advanced Nuclear Materials , Physics
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Beihang University Beijing China (2) Groupe de Physique Th\'eorique IPN Universit\'e Paris-Sud 11 Orsay France (3) Institut f\"ur Theoretische Physik II Ruhr-Universit\"at Bochum (4) Helmholtz-Institut f\"ur Strahlen- und Kernphysik Bethe Center for Theoretical Physics Universit\"at Bonn)
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classification ✦ hep-ph
keywords baryonscatteringchiralcovariantdataperturbationschemetheory
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In this present work, we study the scattering of a pseudoscalar meson off one ground state octet baryon in covariant baryon chiral perturbation theory up to the next-to-next-to-leading order. We remove the power counting breaking terms with the extended-on-mass-shell scheme. We perform the first combined study of the pion-nucleon and kaon-nucleon scattering data and show that the covariant baryon Chiral perturbation theory can provide a reasonable description of the experimental data for both channels.

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