Observation of the singly cabibbo suppressed decay ?_{c}^{+}?n?^{+}
Yükleniyor...
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The singly Cabibbo-suppressed decay ?_{c}^{+}?n?^{+} is observed for the first time with a statistical significance of 7.3? by using 3.9 fb^{-1} of e^{+}e^{-} collision data collected at center-of-mass energies between 4.612 and 4.699 GeV with the BESIII detector at BEPCII. The branching fraction of ?_{c}^{+}?n?^{+} is measured to be (6.6±1.2_{stat}±0.4_{syst})×10^{-4}. By taking the upper limit of branching fractions of ?_{c}^{+}?p?^{0} from the Belle experiment, the ratio of branching fractions between ?_{c}^{+}?n?^{+} and ?_{c}^{+}?p?^{0} is calculated to be larger than 7.2 at the 90% confidence level, which disagrees with most predictions of the available phenomenological models. In addition, the branching fractions of the Cabibbo-favored decays ?_{c}^{+}???^{+} and ?_{c}^{+}??^{0}?^{+} are measured to be (1.31±0.08_{stat}±0.05_{syst})×10^{-2} and (1.22±0.08_{stat}±0.07_{syst})×10^{-2}, respectively, which are consistent with previous results.
Açıklama
Anahtar Kelimeler
Kaynak
Physical Rewiev Latters
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
128
Sayı
14
Künye
Ablikim M, Achasov M. N, Begzsuren K, Berger N, Bertani M, Bettoni D, Cetin, S. A, Chen Z. J, Cheng W. S, Cibinetto G, Cossio F, Cui X. F, Guo A. Q, Guo L. B, Guo R. P, Guo Y. P, Guskov A, Jing M. Q, Johansson T, Kalantar-Nayestanaki N, Kolcu, O. B T, Li C, Li C. H, Li C, Li D. M, Li F, Li G, Liu W. M, Liu X, Liu Y, Liu Y. B, Liu Z. A, Liu ZQ, Lou X. C, BESIII Collaboration. Observation of the Singly Cabibbo Suppressed Decay Λ_{c}^{+}→nπ^{+}. Phys Rev Lett. 2022 Apr 8;128(14):142001. doi: 10.1103/PhysRevLett.128.142001. PMID: 35476477.
