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Observation of muonic Dalitz decays of chib mesons and precise spectroscopy of hidden-beauty states

MPS-Authors
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Schmelling,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertyaev,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

LHCb Collaboration, Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2024). Observation of muonic Dalitz decays of chib mesons and precise spectroscopy of hidden-beauty states. Journal of High Energy Physics, 2024(10): 122. doi:10.1007/JHEP10(2024)122.


Cite as: https://hdl.handle.net/21.11116/0000-0010-0846-7
Abstract
The decays of the Xb1(1P), Xb2(1P), Xb1(2P) and Xb2(2P) mesons into the Υ(1S)μ+μ final state are observed with a high significance using proton-proton collision data collected with the LHCb detector and corresponding to an integrated luminosity of 9 fb−1. The newly observed decays together with the Υ(2S) → Υ(1S)π+π and Υ(3S) → Υ(2S)π+π decay modes are used for precision measurements of the mass and mass splittings for the hidden-beauty states.