@Article{Ren_etal2017,
author="Ren, X. L.
and Alvarez-Ruso, L.
and Geng, L. S.
and Ledwig, T.
and Meng, J.
and Vicente Vacas, M. J.",
title="Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass",
journal="Physics Letters B",
year="2017",
publisher="Elsevier Science Bv",
volume="766",
pages="325--333",
optkeywords="Baryon chiral perturbation theory; Lattice QCD; Nucleon mass and sigma term",
abstract="Treating the strange quark mass as a heavy scale compared to the light quark mass, we perform a matching of the nucleon mass in the SU(3) sector to the two-flavor case in covariant baryon chiral perturbation theory. The validity of the 19low-energy constants appearing in the octet baryon masses up to next-to-next-to-next-to-leading order[1] is supported by comparing the effective parameters (the combinations of the 19couplings) with the corresponding low-energy constants in the SU(2) sector[2]. In addition, it is shown that the dependence of the effective parameters and the pion-nucleon sigma term on the strange quark mass is relatively weak around its physical value, thus providing support to the assumption made in Ref.[2] that the SU(2) baryon chiral perturbation theory can be applied to study n(f) = 2 + 1lattice QCD simulations as long as the strange quark mass is close to its physical value.",
optnote="WOS:000396438300043",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3003), last updated on Mon, 03 Apr 2017 16:25:12 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2017.01.024",
opturl="http://arxiv.org/abs/1606.03820",
opturl="https://doi.org/10.1016/j.physletb.2017.01.024",
archivePrefix="arXiv",
eprint="1606.03820",
language="English"
}