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arXiv · 2012.07767

Octet and decuplet baryon self-energies in relativistic SU(3) chiral effective theory

P. M. Copeland·Chueng-Ryong Ji·W. Melnitchouk
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Abstract

The self-energies of the full set of flavor SU(3) octet and decuplet baryons are computed within a relativistic chiral effective theory framework. The leading nonanalytic chiral behavior is derived for the octet and decuplet masses, and a finite-range regularization consistent with Lorentz and gauge invariance is applied to account for the finite size of the baryons. Using a four-dimensional dipole form factor, the relative importance of various meson-baryon loop contributions to the self-energies is studied numerically as a function of the dipole range parameter and meson mass, and comparison is made between the relativistic results and earlier approximations within the heavy baryon limit.

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P. M. Copeland, Chueng-Ryong Ji, W. Melnitchouk. 2020-12-14. Octet and decuplet baryon self-energies in relativistic SU(3) chiral effective theory. https://doi.org/10.1103/physrevd.103.094019

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