Research output: Contribution to journal › Article › peer-review
Observation of the singly Cabibbo-suppressed decay Λc+→Σ−K+π+. / BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.
In: Physical Review D, Vol. 109, No. 7, L071103, 30.04.2024.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Observation of the singly Cabibbo-suppressed decay Λc+→Σ−K+π+
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. n.
AU - Adlarson, P.
AU - Ai, X. c.
AU - Aliberti, R.
AU - Amoroso, A.
AU - An, M. r.
AU - An, Q.
AU - Bai, Y.
AU - Bakina, O.
AU - Balossino, I.
AU - Ban, Y.
AU - Batozskaya, V.
AU - Begzsuren, K.
AU - Berger, N.
AU - Berlowski, M.
AU - Bertani, M.
AU - Bettoni, D.
AU - Bianchi, F.
AU - Bianco, E.
AU - Bortone, A.
AU - Briere, R. a.
AU - Brueggemann, A.
AU - Cai, H.
AU - Cai, X.
AU - Calcaterra, A.
AU - Cao, G. f.
AU - Cao, N.
AU - Николаев, Иван Борисович
AU - Мучной, Николай Юрьевич
PY - 2024/4/30
Y1 - 2024/4/30
N2 - The singly Cabibbo-suppressed decay Λc+→ς-K+π+ is observed for the first time with a statistical significance of 5.4σ 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 Λc+→ς-K+π+ 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 Λc+ decay involving ς- in the final state. The ratio of branching fractions between Λc+→ς-K+π+ and the Cabibbo-favored decay Λc+→ς-π+π+ is observed to be (0.4±0.1)sc2, where scsinθc=0.2248 with θc the Cabibbo mixing angle.
AB - The singly Cabibbo-suppressed decay Λc+→ς-K+π+ is observed for the first time with a statistical significance of 5.4σ 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 Λc+→ς-K+π+ 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 Λc+ decay involving ς- in the final state. The ratio of branching fractions between Λc+→ς-K+π+ and the Cabibbo-favored decay Λc+→ς-π+π+ is observed to be (0.4±0.1)sc2, where scsinθc=0.2248 with θc the Cabibbo mixing angle.
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85192167942&origin=inward&txGid=3d2a774e4c1b4c7592e4d76fa53a1430
U2 - 10.1103/PhysRevD.109.L071103
DO - 10.1103/PhysRevD.109.L071103
M3 - Article
VL - 109
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 7
M1 - L071103
ER -
ID: 62715744