Baryon masses at second order in large-Nchiral 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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We analyse the baryon mass spectrum in a framework which combines the 1/Nc expansion with chiral perturbation theory. Meson loop contributions involving the full SU(3) octet of pseudoscalar Goldstone bosons are evaluated, and the influence of explicit chiral and flavor symmetry breaking by non-zero and unequal quark masses is investigated. We also discuss sigma terms and the strangeness contrib...
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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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Interactions of two baryons are considered in large NC chiral perturbation theory and compared to the interactions derived from the Skyrme model. Special attention is given to a torus-like configuration known to be present in the Skyrme model. PACS numbers 13.75.Cs, 12.39.Dc, 12.39.Fe, 12.40-y Typeset using REVTEX Electronic address: [email protected] 1
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1996
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.54.2317