Lowest-lying octet baryon masses in covariant baryon chiral perturbation theory

Abstract

We report on a systematic study of the ground-state octet baryon masses in the covariant baryon chiral perturbation theory with the extended-on-mass-shell renormalization scheme up to next-to-next-to-next-to-leading order, taking into account the contributions of the virtual decuplet baryons. A reasonable description of the lattice results is achieved by fitting simultaneously all the publicly available $n_f=2+1$ lattice QCD data. It confirms that the various lattice simulations are consistent with each other. We stress that a self-consistent treatment of finite-volume corrections is important to obtain a ${\chi }^2/d.o.f.$ about 1.

4 pages, 1 table; presented by Xiu-Lei Ren at the 9th international workshop on the physics of excited nucleons (NSTAR2013), May 27-30, 2013, Peniscola, Spain

References in corpus (9)

• Ab-initio Determination of Light Hadron Masses
• First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
• Light hadron spectroscopy using domain wall valence quarks on an Asqtad sea
• Cutoff schemes in chiral perturbation theory and the quark mass expansion of the nucleon mass
• The lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory
• Chiral Extrapolations and the Covariant Small Scale Expansion
• Decuplet baryon masses in covariant baryon chiral perturbation theory
• Virtual decuplet effects on octet baryon masses in covariant baryon chiral perturbation theory
• Chiral extrapolation of baryon mass ratios