Charmed Baryon Masses in Chiral Perturbation Theory

Details Charmed Baryon Masses in Chiral Perturbation Theory Charmed Baryon Masses in Chiral Perturbation Theory

1995-08-08

arxiv.org/abs/hep-ph/9508268v1

Phys.Lett. B359 (1995) 189-193

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, Revtex

Scientific paper

10.1016/0370-2693(95)01060-4

The masses of the charmed baryons in the ${\bf 6}$ representation of $SU(3)$ obey an equal spacing rule at lowest order in $SU(3)$ breaking, ${\cal O}(m_s)$. We compute the corrections to this relation at order ${\cal O}(m_s^{3/2})$ arising from meson loops using chiral perturbation theory combined with heavy quark symmetry and find them to be small. We also examine the hyperfine interaction responsible for the splitting between the $J^\pi={3\over 2}^+$ and $J^\pi={1\over 2}^+$ baryons in the \ss\ representation. The results also hold in the b-baryon sector.

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