Predictions for masses of Xi_b baryons

Details Predictions for masses of Xi_b baryons Predictions for masses of Xi_b baryons

2007-06-14

arxiv.org/abs/0706.2163v5

Physics

High Energy Physics

High Energy Physics - Phenomenology

Figure annotation amended

Scientific paper

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.

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