Observation of the singly Cabibbo-suppressed decay ?c+ ? ?-K+?+
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Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The singly Cabibbo-suppressed decay ?c+??-K+?+ is observed for the first time with a statistical significance of 5.4? by using 4.5 fb-1 of e+e- collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. The absolute branching fraction of ?c+??-K+?+ is measured to be (3.8±1.2stat±0.2syst)×10-4 in a model-independent approach. This is the first observation of a Cabibbo-suppressed ?c+ decay involving ?- in the final state. The ratio of branching fractions between ?c+??-K+?+ and the Cabibbo-favored decay ?c+??-?+?+ is observed to be (0.4±0.1)sc2, where scsin?c=0.2248 with ?c the Cabibbo mixing angle. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Açıklama
Anahtar Kelimeler
Kaynak
Physical Review D
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
109
Sayı
7
