Sigma term and strangeness content of the nucleon

Abstract : A status report is given for a joint project of the Budapest-Marseille-Wuppertal collaboration and the Regensburg group to study the quark mass-dependence of octet baryons in SU(3) Baryon XPT. This formulation is expected to extend to larger masses than Heavy-Baryon XPT. Its applicability is tested with 2+1 flavor data which cover three lattice spacings and pion masses down to about 190 MeV, in large volumes. Also polynomial and rational interpolations in M_\pi^2 and M_K^2 are used to assess the uncertainty due to the ansatz. Both frameworks are combined to explore the precision to be expected in a controlled determination of the nucleon sigma term and strangeness content.
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Submitted on : Monday, January 18, 2016 - 4:20:04 PM
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  • HAL Id : hal-01258108, version 1
  • ARXIV : 1012.1208



S. Durr, Z. Fodor, J. Frison, T. Hemmert, C. Hoelbling, et al.. Sigma term and strangeness content of the nucleon. 28th International Symposium on Lattice Field Theory (Lattice 2010), Jun 2010, Villasimius, Italy. pp.102. ⟨hal-01258108⟩



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