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First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−. / BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.

In: Physical Review D, Vol. 109, No. 3, 032003, 07.02.2024.

Research output: Contribution to journal › Article › peer-review

Harvard

BESIII Collaboration, Николаев, ИБ & Мучной, НЮ 2024, 'First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−', Physical Review D, vol. 109, no. 3, 032003. https://doi.org/10.1103/PhysRevD.109.032003

APA

BESIII Collaboration, Николаев, И. Б., & Мучной, Н. Ю. (2024). First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−. Physical Review D, 109(3), [032003]. https://doi.org/10.1103/PhysRevD.109.032003

Vancouver

BESIII Collaboration, Николаев ИБ, Мучной НЮ. First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−. Physical Review D. 2024 Feb 7;109(3):032003. doi: 10.1103/PhysRevD.109.032003

Author

BESIII Collaboration ; Николаев, Иван Борисович ; Мучной, Николай Юрьевич. / First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−. In: Physical Review D. 2024 ; Vol. 109, No. 3.

BibTeX

@article{97f9b306cb9641c4ae945c5566d930a3,
title = "First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−",
abstract = "We present the first observation of the singly Cabibbo-suppressed decay Λc+→ΛK+π0 with a significance of 5.7σ and the first evidence of Λc+→ΛK+π+π- decay with a significance of 3.1σ, based on e+e- annihilation data recorded by the BESIII detector at the BEPCII collider. The data correspond to an integrated luminosity of 6.4 fb-1, in the center-of-mass energy range from 4.600 to 4.950 GeV. We determine the branching fractions of Λc+→ΛK+π0 and Λc+→ΛK+π+π- relative to their Cabibbo-favored counterparts to be B(Λc+→ΛK+π0)B(Λc+→Λπ+π0)=(2.09±0.39stat±0.07syst)×10-2 and B(Λc+→ΛK+π+π-)B(Λc+→Λπ+π+π-)=(1.13±0.41stat±0.06syst)×10-2, respectively. Moreover, by combining our measured result with the world average of B(Λc+→Λπ+π0), we obtain the branching fraction B(Λc+→ΛK+π0)=(1.49±0.27stat±0.05syst±0.08ref)×10-3. This result significantly departs from theoretical predictions based on quark SU(3) flavor symmetry, which is underpinned by the presumption of meson pair S-wave amplitude dominance. ",
author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and P. Adlarson and X. c. Ai and R. Aliberti and A. Amoroso and M. r. An and Q. An and Y. Bai and O. Bakina and I. Balossino and Y. Ban and H.-R. Bao and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. Bertani and D. Bettoni and F. Bianchi and E. Bianco and A. Bortone and R. a. Briere and A. Brueggemann and H. Cai and X. Cai and Николаев, {Иван Борисович} and Мучной, {Николай Юрьевич}",
year = "2024",
month = feb,
day = "7",
doi = "10.1103/PhysRevD.109.032003",
language = "English",
volume = "109",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "AMER PHYSICAL SOC",
number = "3",

}

RIS

TY - JOUR

T1 - First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+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 - Bao, H.-R.

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 - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2024/2/7

Y1 - 2024/2/7

N2 - We present the first observation of the singly Cabibbo-suppressed decay Λc+→ΛK+π0 with a significance of 5.7σ and the first evidence of Λc+→ΛK+π+π- decay with a significance of 3.1σ, based on e+e- annihilation data recorded by the BESIII detector at the BEPCII collider. The data correspond to an integrated luminosity of 6.4 fb-1, in the center-of-mass energy range from 4.600 to 4.950 GeV. We determine the branching fractions of Λc+→ΛK+π0 and Λc+→ΛK+π+π- relative to their Cabibbo-favored counterparts to be B(Λc+→ΛK+π0)B(Λc+→Λπ+π0)=(2.09±0.39stat±0.07syst)×10-2 and B(Λc+→ΛK+π+π-)B(Λc+→Λπ+π+π-)=(1.13±0.41stat±0.06syst)×10-2, respectively. Moreover, by combining our measured result with the world average of B(Λc+→Λπ+π0), we obtain the branching fraction B(Λc+→ΛK+π0)=(1.49±0.27stat±0.05syst±0.08ref)×10-3. This result significantly departs from theoretical predictions based on quark SU(3) flavor symmetry, which is underpinned by the presumption of meson pair S-wave amplitude dominance.

AB - We present the first observation of the singly Cabibbo-suppressed decay Λc+→ΛK+π0 with a significance of 5.7σ and the first evidence of Λc+→ΛK+π+π- decay with a significance of 3.1σ, based on e+e- annihilation data recorded by the BESIII detector at the BEPCII collider. The data correspond to an integrated luminosity of 6.4 fb-1, in the center-of-mass energy range from 4.600 to 4.950 GeV. We determine the branching fractions of Λc+→ΛK+π0 and Λc+→ΛK+π+π- relative to their Cabibbo-favored counterparts to be B(Λc+→ΛK+π0)B(Λc+→Λπ+π0)=(2.09±0.39stat±0.07syst)×10-2 and B(Λc+→ΛK+π+π-)B(Λc+→Λπ+π+π-)=(1.13±0.41stat±0.06syst)×10-2, respectively. Moreover, by combining our measured result with the world average of B(Λc+→Λπ+π0), we obtain the branching fraction B(Λc+→ΛK+π0)=(1.49±0.27stat±0.05syst±0.08ref)×10-3. This result significantly departs from theoretical predictions based on quark SU(3) flavor symmetry, which is underpinned by the presumption of meson pair S-wave amplitude dominance.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85185324312&origin=inward&txGid=682fd77c11b461a238f13f0bc8bb7ce4

U2 - 10.1103/PhysRevD.109.032003

DO - 10.1103/PhysRevD.109.032003

M3 - Article

VL - 109

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 3

M1 - 032003

ER -

ID: 62718552