Sigma term and strangeness content of the nucleon

Details Sigma term and strangeness content of the nucleon Sigma term and strangeness content of the nucleon

2010-12-06

arxiv.org/abs/1012.1208v1

PoS Lattice2010:102,2010

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2010

Scientific paper

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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