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

Aaij, Roel; Abdelmotteleb, Ahmed Sameh Wagih; Abellan Beteta, Carlos; Abudinén, Fernando Jesus; Ackernley, Thomas; Adefisoye, A.A.; Adefisoye, Ayomide Matthew; Adeva, Bernardo; Adinolfi, Marco; Adlarson, Patrik Harri

doi:10.1007/JHEP10(2024)122

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

LHCb

Collaboration

Aug 9, 2024

29 pages

Published in:

JHEP 10 (2024) 122 (preprint)

Published: Oct 16, 2024

e-Print:

2408.05134 [hep-ex]

DOI:

10.1007/JHEP10(2024)122 (publication)

Report number:

LHCb-PAPER-2024-025,
CERN-EP-2024-207

Experiments:

CERN-LHC-LHCb

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Abstract: (Springer)

The decays of the χ

_{b1}

(1P), χ

_{b2}

(1P), χ

_{b1}

(2P) and χ

_{b2}

(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.[graphic not available: see fulltext]

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/3633

Hadron-Hadron Scattering
Quarkonium
Spectroscopy

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