The quark model and b baryons |
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Authors: | Marek Karliner Harry J Lipkin Jonathan L Rosner |
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Institution: | a Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel b Department of Particle Physics, Weizmann Institute of Science, Rehovoth 76100, Israel c High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439-4815, USA d Enrico Fermi Institute and Department of Physics, University of Chicago, 5640 S. Ellis Avenue, Chicago, IL 60637, USA |
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Abstract: | The recent observation at the Tevatron of (uub and ddb) baryons within 2 MeV of the predicted Σb-Λb splitting and of baryons at the Tevatron within a few mega electron volts (MeV) of predictions has provided strong confirmation for a theoretical approach based on modeling the color hyperfine interaction. The prediction of = 5790-5800 MeV is reviewed and similar methods used to predict the masses of the excited states and . The main source of uncertainty is the method used to estimate the mass difference mb-mc from known hadrons. We verify that corrections due to the details of the interquark potential and to Ξb- mixing are small. For S-wave qqb states we predict , and . For states with one unit of orbital angular momentum between the b quark and the two light quarks we predict , and . Results are compared with those of other recent approaches. |
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Keywords: | 14 20 Mr 12 40 Yx 12 39 Jh 11 30 Hw |
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