Regular Article – Theoretical Physics
Strong decays of the lowest bottomonium hybrid within an extended Born–Oppenheimer framework
Unidad Teórica, Instituto de Física Corpuscular (Universidad de Valencia-CSIC), 46980, Paterna, Valencia, Spain
2 Departamento de Física Teórica, Universidad de Valencia, 46100, Burjassot, Valencia, Spain
Accepted: 13 January 2021
Published online: 23 January 2021
We analyze the decays of the theoretically predicted lowest bottomonium hybrid H(1P) to open bottom two-meson states. We do it by embedding a quark pair creation model into the Born–Oppenheimer framework which allows for a unified, QCD-motivated description of bottomonium hybrids as well as bottomonium. A new decay model for H(1P) comes out. The same analysis applied to bottomonium leads naturally to the well-known decay model. We show that H(1P) and the theoretically predicted bottomonium state , whose calculated masses are close to each other, have very different widths for such decays. A comparison with data from , an experimental resonance whose mass is similar to that of and H(1P), is carried out. Neither a nor a H(1P) assignment can explain the measured decay widths. However, a –H(1P) mixing may give account of them supporting previous analyses of dipion decays of and suggesting a possible experimental evidence of H(1P).
© The Author(s) 2021
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