Chiral corrections to the Roper mass

Borasoy, B.; Lewis, R.; Meissner, U.G.; Bruns, P. C.

doi:10.1016/j.physletb.2006.08.057

Journal Article

PreJuSER-55015

Chiral corrections to the Roper mass

Borasoy, B. ; Bruns, P. C. ; Meissner, U. G.FZJ* ; Lewis, R.

2006
North-Holland Publ. Amsterdam

Physics letters / B 641, 294 - 300 (2006) [10.1016/j.physletb.2006.08.057]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/10566 doi:10.1016/j.physletb.2006.08.057

Abstract: We analyze the quark mass dependence of the Roper mass to one-loop order in relativistic baryon chiral perturbation theory. The loop integrals are evaluated using infrared regularization which preserves chiral symmetry and establishes a chiral counting scheme. The derived chiral expansion of the Roper mass may prove useful for chiral extrapolations of lattice data. For couplings of natural size the quark mass dependence of the Roper mass is similar to the one of the nucleon. (c) 2006 Elsevier B.V. All rights reserved.

Keyword(s): N(1440): mass ; quark: mass ; pi: mass ; perturbation theory: chiral ; regularization ; quantum chromodynamics ; effective Lagrangian ; numerical calculations ; lattice QCD calculations (auto) ; chiral Lagrangians (auto) ; hadron mass models and calculations (auto)