abstract

• We discuss how to compute corrections to one-loop order to the baryon axial-vector current and magnetic moments in heavy baryon chiral perturbation theory in the large-Nc limit, where Nc is the number of colors. Loop graphs with octet and decuplet intermediate states cancel to various orders in Nc as a consequence of the large-Nc spin-flavor symmetry of QCD baryons. These cancellations are explicitly shown for the general case of Nf flavors of light quarks. We also indicate how to compare our resultant expressions with the corresponding ones obtained within conventional heavy baryon chiral perturbation theory at the physical values Nc 3, Nf 3. We observe an excellent agreement order by order. © Published under licence by IOP Publishing Ltd.

authors

• Flores Mendieta Rubén
• Hernández-Ruiz M.A.
• Hofmann C.P.

publication date

• 2012-01-01

published in

• Journal of Physics: Conference Series  Journal

keywords

• Hadrons; Magnetic moments; Axial vector; Chiral perturbation theory; Flavor symmetry; Intermediate state; Large N; Light quarks; Loop order; Perturbation techniques

Digital Object Identifier (DOI)

• 10.1088/1742-6596/378/1/012039

start page

end page

volume

• 378

issue

• 1