Predictions for masses of Xi_b baryons

Abstract

The recent observation by CDF of Sigma_b^{+-} (uub and ddb) baryons within 2 MeV of the predicted Sigma_b - Lambda_b splitting has provided strong confirmation for the theoretical approach based on modeling the color hyperfine interaction. We now apply this approach to predict the masses of the Xi_b family of baryons with quark content usb and dsb - the ground state Xi_b at 5790 to 5800 MeV, and the excited states Xi_b^' and Xi_b^*. The main source of uncertainty is the method used to estimate the mass difference m_b - m_c from known hadrons. We verify that corrections due to the details of the interquark potential and to Xi_b-Xi_b^' mixing are small.

Figure annotation amended

References in corpus (5)

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Cited by in corpus (10)

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• SU(3) mass-splittings of heavy-baryons in QCD
• Mass-splittings of doubly heavy baryons in QCD
• Isospin splittings in baryons with two heavy quarks
• Prospects for observing the lowest-lying odd-parity ${\Sigma }_c$ and ${\Sigma }_b$ baryons
• Structure of the ${\Xi }_b(6227{)}^{-}$ Resonance
• The doubly heavies: (Qbar Q qbar q), (Q Q qbar qbar) tetraquarks and (Q Q q) baryons
• Heavy Baryons and Exotics Spectrum
• Spectroscopy of Hadrons with b Quarks