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Abstract: The ??b ?þ?? invariant mass spectrum is investigated with an event sample of proton-proton collisions at ffiffiffi s p ¼ 13 TeV, collected by the CMS experiment at the LHC in 2016?2018 and corresponding to an integrated luminosity of 140 fb?1. The ground state ??b is reconstructed via its decays to J=??? and J=??K?. A narrow resonance, labeled ?bð6100Þ?, is observed at a ??b ?þ?? invariant mass of 6100.3 0.2ðstatÞ 0.1ðsystÞ 0.6ð??b Þ MeV, where the last uncertainty reflects the precision of the ??b baryon mass. The upper limit on the ?bð6100Þ? natural width is determined to be 1.9 MeV at 95% confidence level. The low ?bð6100Þ? signal yield observed in data does not allow a measurement of the quantum numbers of the new state. However, following analogies with the established excited ?c baryon states, the new ?bð6100Þ? resonance and its decay sequence
Fuente: Phys. Rev. Lett. 126, 252003 (2021)
Editorial: American Physical Society
Fecha de publicación: 25/06/2021
Nº de páginas: 19
Tipo de publicación: Artículo de Revista
DOI: 10.1103/PhysRevLett.126.252003
ISSN: 0031-9007,1079-7114
Url de la publicación: https://doi.org/10.1103/PhysRevLett.126.252003
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SIRUNYAN, A. M.
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
CELIA FERNANDEZ MADRAZO
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
PABLO MATORRAS CUEVAS
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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