Baryon masses at second order in chiral perturbation theory
نویسندگان
چکیده
منابع مشابه
Baryon Masses at Second Order in Chiral Perturbation Theory
We analyze the baryon mass differences up to second order in chiral perturbation theory, including the effects of decuplet intermediate states. We show that the Coleman–Glashow relation has computable corrections of order (md − mu)ms. These corrections are numerically small, and in agreement with the data. We also show that corrections to the Σ equal-spacing rule are dominated by electromagneti...
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We consider flavor breaking in the the octet and decuplet baryon masses at second order in large-N chiral perturbation theory, where N is the number of QCD colors. We assume that 1/N ∼ 1/NF ∼ ms/Λ ≫ mu,d/Λ, αEM, where NF is the number of light quark flavors, and mu,d,s/Λ are the parameters controlling SU(NF ) flavor breaking in chiral perturbation theory. We consistently include non-analytic co...
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The masses of the charmed baryons in the 6 representation of SU(3) obey an equal spacing rule at lowest order in SU(3) breaking, O(ms). We compute the corrections to this relation at order O(m s ) arising from meson loops using chiral perturbation theory combined with heavy quark symmetry and find them to be small. We also examine the hyperfine interaction responsible for the splitting between ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1994
ISSN: 0370-2693
DOI: 10.1016/0370-2693(94)91093-6