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Bottomonium spectrum with coupled-channel effects

  • Regular Article - Theoretical Physics
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Abstract

We study the bottomonium spectrum in the nonrelativistic quark model with coupled-channel effects. The mass shifts and valence \(b\bar{b}\) component are evaluated to be rather large. We find that the hadronic loop effects can be partially absorbed into a reselection of the model parameters. No bottomonium state except ϒ(5 1 S 0) and ϒ(5 3 S 1) with mass around 10890 MeV is found in the quark models both with and without coupled-channel effects, so we suggest that Y b (10890) is an exotic state beyond the quark model, if it is confirmed to be a new resonance. The predictions for the χ b (3P) masses are consistent with the ATLAS measurements. If some new bottomonium-like states are observed at LHCb or SuperB in the future, we can determine whether they are conventional bottomonium or exotic states by comparing their masses with the mass spectrum predicted in our work.

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Authors and Affiliations

  1. Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China

    Jia-Feng Liu & Gui-Jun Ding

  2. Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, WI, 53706, USA

    Gui-Jun Ding

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  1. Jia-Feng Liu
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Liu, JF., Ding, GJ. Bottomonium spectrum with coupled-channel effects. Eur. Phys. J. C 72, 1981 (2012). https://doi.org/10.1140/epjc/s10052-012-1981-6

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  • DOI: https://doi.org/10.1140/epjc/s10052-012-1981-6

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