Flavor decomposition of the pion-nucleon $\sigma$-term
High Energy Physics - Phenomenology
2019-04-04 v2 High Energy Physics - Lattice
Nuclear Theory
Abstract
We re-analyze the flavor decomposition of the pion-nucleon -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
Cite
@article{arxiv.1902.10508,
title = {Flavor decomposition of the pion-nucleon $\sigma$-term},
author = {Daniel Severt and Ulf-G. Meißner and Jambul Gegelia},
journal= {arXiv preprint arXiv:1902.10508},
year = {2019}
}
Comments
31 pages, 1 figure, published version, some minor modifications