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Baryon masses in a loop expansion with a form factor
Physical Review D, Particles and fields
We show that the average multiplet masses in the baryon octet and decuplet can be fitted with an average error of only 0.5± 0.3 MeV in a meson loop expansion with chiral SU(6) couplings, with the hadrons treated as composite particles using a baryon-meson form factor. The form factor suppresses unphysical short distance effects and leads to a controllable expansion. We find, in contrast to the results of standard chiral perturbation theory, that pion loops are as important as kaon or eta loopsdoi:10.1103/physrevd.59.076001 fatcat:os7ci2j4uba23evil7vk36p2mi