Observation of the hindered electromagnetic dalitz decay ? (3686) ?e+e-?c
Yükleniyor...
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
APS
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Using a data sample of (448.1±2.9)×106 ?(3686) decays collected at an e+e- center-of-mass energy of 3.686 GeV by the BESIII detector at Beijing Electron Positron Collider II, we report an observation of the hindered electromagnetic Dalitz decay ?(3686)?e+e-?c with a significance of 7.9?. The branching fraction is determined to be B(?(3686)?e+e-?c)=(3.77±0.40stat±0.18syst)×10-5, agreeing well with the prediction of the vector meson dominance model. This is the first measurement of the electromagnetic Dalitz transition between the ?(3686) and the ?c, which provides new insight into the electromagnetic properties of this decay, and offers new opportunities to measure the absolute branching fractions of ?c decays. © 2022 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
American Physical Society
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
106
Sayı
11
Künye
Ablikim, M., Achasov, M. N., Adlarson, P., Albrecht, M., Aliberti, R., Amoroso, A., ... & Jiang, X. S. (2022). Observation of the hindered electromagnetic Dalitz decay ψ (3686)→ e+ e− η c. Physical Review D, 106(11), 112002.
