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Abstract: Using a data sample of proton-proton collisions at ?s=13?TeV, corresponding to an integrated luminosity of 140??fb?1 collected by the CMS experiment in 2016?2018, the B0s?X(3872)? decay is observed. Decays into J/??+?? and K+K? are used to reconstruct, respectively, the X(3872) and ?. The ratio of the product of branching fractions B[B0s?X(3872)?]B[X(3872)?J/??+??] to the product B[B0s??(2S)?]B[?(2S)?J/??+??] is measured to be [2.21±0.29(stat)±0.17(syst)]%. The ratio B[B0s?X(3872)?]/B[B0?X(3872)K0] is found to be consistent with one, while the ratio B[B0s?X(3872)?]/B[B+?X(3872)K+] is two times smaller. This suggests a difference in the production dynamics of the X(3872) in B0 and B0s meson decays compared to B+. The reported observation may shed new light on the nature of the X(3872) particle.
Fuente: Phys. Rev. Lett. 125, 152001 (2020)
Publisher: American Physical Society
Publication date: 01/10/2020
No. of pages: 18
Publication type: Article
DOI: 10.1103/PhysRevLett.125.152001
ISSN: 0031-9007,1079-7114
Publication Url: https://doi.org/10.1103/PhysRevLett.125.152001
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LORENZO RUSSO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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