Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory

Details Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory

2008-09-13

arxiv.org/abs/0809.2359v1

JHEP0809:136,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 2 figures

Scientific paper

10.1088/1126-6708/2008/09/136

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.

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