Baryon masses in large N c chiral perturbation theory ∗
نویسندگان
چکیده
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 contribution to the nucleon mass. Typeset using REVTEX ∗Work supported in part by BMBF †Alexander von Humboldt fellow, E-mail address: [email protected]
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تاریخ انتشار 1999