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2006•Communications in Theoretical PhysicsOpen access

Sigma Terms and Strangeness Contents of Baryon Octet in Modified Chiral Perturbation Theory

Li Xiao-Ya, Lü Xiao-Fu

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Abstract

In the frame work of chiral perturbation theory, a modified effective Lagrangian for meson-baryon system is constructed, where the SU(3) breaking effect for meson is considered. The difference between physical and chiral limit decay constants is taken into account. Calculated to one loop at O(p 3 ), the sigma terms and strangeness contents of baryon octet are obtained.

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In the frame work of chiral perturbation theory, a modified effective Lagrangian for meson-baryon system is constructed, where the SU(3) breaking effect for meson is considered. The difference between physical and chiral limit decay constants is taken into account. Calculated to one loop at O(p 3 ), the sigma terms and strangeness contents of baryon octet are obtained.

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Available abstract

In the frame work of chiral perturbation theory, a modified effective Lagrangian for meson-baryon system is constructed, where the SU(3) breaking effect for meson is considered. The difference between physical and chiral limit decay constants is taken into account. Calculated to one loop at O(p 3 ), the sigma terms and strangeness contents of baryon octet are obtained.

Key concepts: Octet, Physics, Chiral perturbation theory, Strangeness, Baryon, Particle physics, Sigma, Meson

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