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High Energy Physics - Lattice

arXiv:1602.07688 (hep-lat)
[Submitted on 24 Feb 2016 (v1), last revised 29 Jun 2016 (this version, v2)]

Title:Remarks on the pion-nucleon sigma-term

Authors:Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis, Ulf-G. Meißner
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Abstract:The pion-nucleon $\sigma$-term can be stringently constrained by the combination of analyticity, unitarity, and crossing symmetry with phenomenological information on the pion-nucleon scattering lengths. Recently, lattice calculations at the physical point have been reported that find lower values by about $3\sigma$ with respect to the phenomenological determination. We point out that a lattice measurement of the pion-nucleon scattering lengths could help resolve the situation by testing the values extracted from spectroscopy measurements in pionic atoms.
Comments: 5 pages, 2 figures; version published in PLB
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: INT-PUB-16-006
Cite as: arXiv:1602.07688 [hep-lat]
  (or arXiv:1602.07688v2 [hep-lat] for this version)
  https://doi.org/10.48550/arXiv.1602.07688
Journal reference: Phys.Lett.B760:74-78,2016
Related DOI: https://doi.org/10.1016/j.physletb.2016.06.038

Submission history

From: Martin Hoferichter [view email]
[v1] Wed, 24 Feb 2016 21:00:01 UTC (173 KB)
[v2] Wed, 29 Jun 2016 23:31:06 UTC (174 KB)
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