Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory
High Energy Physics - Phenomenology
2008-11-26 v1 High Energy Physics - Experiment
Abstract
We calculate the mass splittings within the heavy baryon isospin multiplets \Sigma_{c(b)} and \Xi_{c(b)}' in chiral perturbation theory to leading one-loop order. The pattern of the mass splittings in the \Sigma_c iso-triplet, which is different from that of any other known isospin multiplet, can be explained. We predict m_{\Xi_c'^+} - m_{\Xi_c'^0}=-0.2\pm0.6 MeV, m_{\Xi_b'^0} - m_{\Xi_b'^-}=-4.0\pm1.9 MeV and the mass of the \Sigma_b^0 to be 5810.3\pm1.9 MeV.
Keywords
Cite
@article{arxiv.0809.2359,
title = {Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory},
author = {Feng-Kun Guo and Christoph Hanhart and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:0809.2359},
year = {2008}
}
Comments
15 pages, 2 figures