Remarks on the pion-nucleon sigma-term
High Energy Physics - Lattice
2016-07-01 v2 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
The pion-nucleon -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 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.
Cite
@article{arxiv.1602.07688,
title = {Remarks on the pion-nucleon sigma-term},
author = {Martin Hoferichter and Jacobo Ruiz de Elvira and Bastian Kubis and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:1602.07688},
year = {2016}
}
Comments
5 pages, 2 figures; version published in PLB