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Flavor decomposition of the pion-nucleon σ-term

  • Daniel SevertEmail author
  • Ulf-G. Meißner
  • Jambul Gegelia
Open Access
Regular Article - Theoretical Physics
  • 66 Downloads

Abstract

We re-analyze the flavor decomposition of the pion-nucleon σ-term in the framework of baryon chiral perturbation to fourth order. We employ a covariant and the heavy baryon framework including also the low-lying decuplet. Using only continuum data, we find a small strangeness content of the proton. The uncertainties are, however, large and might be overcome by dedicated lattice QCD calculations.

Keywords

Chiral Lagrangians Effective Field Theories 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  • Daniel Severt
    • 1
    Email author
  • Ulf-G. Meißner
    • 1
    • 2
    • 3
  • Jambul Gegelia
    • 4
    • 3
  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical PhysicsUniversität BonnBonnGermany
  2. 2.Institute for Advanced Simulation (IAS-4) Institut für Kernphysik (IKP-3) and JCHPJülichGermany
  3. 3.Tbilisi State UniversityTbilisiGeorgia
  4. 4.Fakultät für Physik und Astronomie, Institut für Theoretische Physik IIRuhr-Universität BochumBochumGermany

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