Abstract

We show our results for the bottomonium spectrum with self energy corrections, due to the coupling to the meson-meson continuum. We also discuss our results for the open bottom strong decays of higher bottomonia in the 3 P 0 pair-creation model.

Highlights

  • Continuum coupling effects, due to the creation of qqpairs, determine a shift of the physical mass of a hadron with respect to its bare mass, as already shown by several authors in the baryon [1] and meson [2,3,4,5,6] sectors

  • We show our results for the bottomonium spectrum with self energy corrections, due to the coupling to the meson-meson continuum

  • We show an application of the unquenched quark model (UQM) [4,5,6, 17,18,19] to the calculation of the bottomonium spectrum with self energy corrections [6]

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Summary

Introduction

Due to the creation of qqpairs, determine a shift of the physical mass of a hadron with respect to its bare mass, as already shown by several authors in the baryon [1] and meson [2,3,4,5,6] sectors. The resonance (1405) is strongly influenced by the nearby K N channel [7] and the f0(980) behaves remarkably as a KKmolecule [8] These continuum coupling (or pair-creation) effects, neglected in the naive quark model (QM) [9,10,11,12,13,14] Since the qqpair corresponds to a 3P0 quark-antiquark state, this is generally known as the 3P0 pair-creation model [20]. In this contribution, we show an application of the unquenched quark model (UQM) [4,5,6, 17,18,19] to the calculation of the bottomonium spectrum with self energy corrections [6].

Self energies in the UQM
Open bottom strong decays in the 3P0 pair-creation model
Continuum components and decay widths in the UQM
Conclusions

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