E. W. Dias, Brigitte Hiller, A. L. Mota, M. C. Nemes, M. Sampaio, A. A. Osipov
Published 2005-03-23, updated 2005-08-10Version 4
We investigate the role of undetermined finite contributions generated by radiative corrections in a $SU(2)\times SU(2)$ linear sigma model with quarks. Although some of such terms can be absorbed in the renormalization procedure, one such contribution is left in the expression for the pion decay constant. This arbitrariness is eliminated by chiral symmetry.
Comments: 9 pages. Added references through the text; an author was added due to an important contribution; corrected typos; the title also was changed. Submitted to Modern Physics Letters
Journal: Mod.Phys.Lett. A21 (2006) 339-347
Searching for the quark--diquark systematics of baryons composed by light quarks $q=u,d$
Improved Effective Action for Light Quarks Beyond Chiral Limit
The $ν_e \to ν_τ$ channel as a tool to solve ambiguities
