%0 Journal Article
%T Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass
%A Ren, X. L.
%A Alvarez-Ruso, L.
%A Geng, L. S.
%A Ledwig, T.
%A Meng, J.
%A Vicente Vacas, M. J.
%J Physics Letters B
%D 2017
%V 766
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F Ren_etal2017
%O WOS:000396438300043
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3003), last updated on Mon, 03 Apr 2017 16:25:12 +0000
%X 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.
%K Baryon chiral perturbation theory
%K Lattice QCD
%K Nucleon mass and sigma term
%R 10.1016/j.physletb.2017.01.024
%U http://arxiv.org/abs/1606.03820
%U https://doi.org/10.1016/j.physletb.2017.01.024
%P 325-333