Relations for low-energy coupling constants in baryon chiral perturbation theory derived from the chiral quark model

Abstract

The quark model symmetry can be adopted to establish relations between the low-energy constants (LECs) in the baryon chiral perturbation theory ($\chi PT$) if one assumes that a baryon-baryon-meson coupling is described equivalently by a quark-quark-meson coupling at the quark level. Through the correspondence between the $SU(2)$ description and the $SU(3)$ description for the same coupling vertex at the quark level, we find some relations between the LECs in $SU(2{)}_{\chi PT}$ and $SU(3{)}_{\chi PT}$ up to the third chiral order. The $SU(3{)}_{\chi PT}$ LEC relations at the same order are also obtained. The numerical analysis roughly supports these relations. In the situation that the available experimental data are not enough, one may employ such constraints to reduce the number of LECs.

arXiv commentVersion to appear in PRD. 16 pages, 2 figures, 7 tables

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Cited by in corpus (3)

• Relations for low-energy constants in baryon chiral perturbation theory with explicit $\Delta (1232)$ derived from the chiral quark model
• Chiral Lagrangians for singly heavy baryons to $\mathcal{O}(p^4)$ order
• Chiral Lagrangians for spin-$\frac{1}{2}$ and spin-$\frac{3}{2}$ doubly charmed baryons