Observation of ?c (2S) ?3 (?+?-) and measurements of ?cJ ?3 (?+?-) in ? (3686) radiative transitions
Yükleniyor...
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The hadronic decay ?c(2S)?3(?+?-) is observed with a statistical significance of 9.3 standard deviations using (448.1±2.9)×106 ?(3686) events collected by the BESIII detector at the BEPCII collider. The measured mass and width of ?c(2S) are (3643.4±2.3 (stat)±4.4 (syst)) MeV/c2 and (19.8±3.9 (stat)±3.1 (syst)) MeV, respectively, which are consistent with the world average values within two standard deviations. The product branching fraction B[?(3686)???c(2S)]×B[?c(2S)?3(?+?-)] is measured to be (9.2±1.0 (stat)±1.2 (syst))×10-6. Using B[?(3686)???c(2S)]=(7.0-2.5+3.4)×10-4, we obtain B[?c(2S)?3(?+?-)]=(1.31±0.15 (stat)±0.17 (syst) (+0.64-0.47) (extr))×10-2, where the third uncertainty is from B[?(3686)???c(2S)]. We also measure the ?cJ?3(?+?-) (J=0, 1, 2) decays via ?????cJ transitions. The branching fractions are B[?c0?3(?+?-)]=(2.080±0.006 (stat)±0.068 (syst))×10-2, B[?c1?3(?+?-)]=(1.092±0.004 (stat)±0.035 (syst))×10-2, and B[?c2?3(?+?-)]=(1.565±0.005 (stat)±0.048 (syst))×10-2. © 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
Physical Review D.
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
106
Sayı
3
Künye
Ablikim, M., Achasov, M. N., Adlarson, P., Albrecht, M., Aliberti, R., Amoroso, A., ... & Jiang, X. S. (2022). Observation of η c (2 S)→ 3 (π+ π−) and measurements of χ c J→ 3 (π+ π−) in ψ (3686) radiative transitions. Physical Review D, 106(3), 032014.
