π N and strangeness sigma terms at the physical point with chiral fermions

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Abstract

Lattice QCD calculations with chiral fermions of the πN sigma term σπN and strangeness sigma term σsN including chiral interpolation with continuum and volume corrections are provided in this work, with the excited-state contaminations subtracted properly. We calculate the scalar matrix element for the light/strange quark directly and find σπN=45.9(7.4)(2.8) MeV, with the disconnected insertion part contributing 20(12)(4)%, and σsN=40.2(11.7)(3.5) MeV, which is somewhat smaller than σπN. The ratio of the strange/light scalar matrix elements is y=0.09(3)(1).

Original languageEnglish
Article number054503
JournalPhysical Review D
Volume94
Issue number5
DOIs
StatePublished - Sep 8 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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