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First observation of the semileptonic decay Λc+→pK−e+νe. / BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.

In: Physical Review D, Vol. 106, No. 11, 112010, 26.12.2022.

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

Harvard

BESIII Collaboration, Николаев, ИБ & Мучной, НЮ 2022, 'First observation of the semileptonic decay Λc+→pK−e+νe', Physical Review D, vol. 106, no. 11, 112010. https://doi.org/10.1103/PhysRevD.106.112010

APA

BESIII Collaboration, Николаев, И. Б., & Мучной, Н. Ю. (2022). First observation of the semileptonic decay Λc+→pK−e+νe. Physical Review D, 106(11), [112010]. https://doi.org/10.1103/PhysRevD.106.112010

Vancouver

BESIII Collaboration, Николаев ИБ, Мучной НЮ. First observation of the semileptonic decay Λc+→pK−e+νe. Physical Review D. 2022 Dec 26;106(11):112010. doi: 10.1103/PhysRevD.106.112010

Author

BESIII Collaboration ; Николаев, Иван Борисович ; Мучной, Николай Юрьевич. / First observation of the semileptonic decay Λc+→pK−e+νe. In: Physical Review D. 2022 ; Vol. 106, No. 11.

BibTeX

@article{82738450baf04ad6bd8193c992220a9b,
title = "First observation of the semileptonic decay Λc+→pK−e+νe",
abstract = "Using 4.5 fb-1 of e+e- annihilation data samples collected at the center-of-mass energies ranging from 4.600 GeV to 4.699 GeV with the BESIII detector at the BEPCII collider, a first study of the semileptonic decays Λc+→pK-e+νe, Λc+→Λ(1520)e+νe and Λc+→Λ(1405)e+νe is performed. The Λc+→pK-e+νe decay is observed with a significance of 8.2σ and the branching fraction is measured to be B(Λc+→pK-e+νe)=(0.88±0.17stat±0.07syst)×10-3. We also report evidence of Λc+→Λ(1520)e+νe and Λc+→Λ(1405)e+νe with significances of 3.3σ and 3.2σ, respectively, and measure B(Λc+→Λ(1520)e+νe)=(1.02±0.52stat±0.11syst)×10-3 and B(Λc+→Λ(1405)[→pK-]e+νe)=(0.42±0.19stat±0.04syst)×10-3. Combining these with the inclusive semileptonic Λc+ branching fraction measured by BESIII, the relative fraction is determined to be [B(Λc+→pK-e+νe)/B(Λc+→Xe+νe)]=(2.1±0.4stat±0.2syst)%, which provides a clear confirmation that semileptonic Λc+ decays are not saturated by the Λℓ+νℓ final state.",
author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Николаев, {Иван Борисович} and Мучной, {Николай Юрьевич}",
note = "First observation of the semileptonic decay Λc+→pK−e+νe / BESIII Collaboration // Physical Review D. – 2022. – Vol. 106, No. 11. – P. 112010. – DOI 10.1103/physrevd.106.112010. ",
year = "2022",
month = dec,
day = "26",
doi = "10.1103/PhysRevD.106.112010",
language = "English",
volume = "106",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "11",

}

RIS

TY - JOUR

T1 - First observation of the semileptonic decay Λc+→pK−e+νe

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

N1 - First observation of the semileptonic decay Λc+→pK−e+νe / BESIII Collaboration // Physical Review D. – 2022. – Vol. 106, No. 11. – P. 112010. – DOI 10.1103/physrevd.106.112010.

PY - 2022/12/26

Y1 - 2022/12/26

N2 - Using 4.5 fb-1 of e+e- annihilation data samples collected at the center-of-mass energies ranging from 4.600 GeV to 4.699 GeV with the BESIII detector at the BEPCII collider, a first study of the semileptonic decays Λc+→pK-e+νe, Λc+→Λ(1520)e+νe and Λc+→Λ(1405)e+νe is performed. The Λc+→pK-e+νe decay is observed with a significance of 8.2σ and the branching fraction is measured to be B(Λc+→pK-e+νe)=(0.88±0.17stat±0.07syst)×10-3. We also report evidence of Λc+→Λ(1520)e+νe and Λc+→Λ(1405)e+νe with significances of 3.3σ and 3.2σ, respectively, and measure B(Λc+→Λ(1520)e+νe)=(1.02±0.52stat±0.11syst)×10-3 and B(Λc+→Λ(1405)[→pK-]e+νe)=(0.42±0.19stat±0.04syst)×10-3. Combining these with the inclusive semileptonic Λc+ branching fraction measured by BESIII, the relative fraction is determined to be [B(Λc+→pK-e+νe)/B(Λc+→Xe+νe)]=(2.1±0.4stat±0.2syst)%, which provides a clear confirmation that semileptonic Λc+ decays are not saturated by the Λℓ+νℓ final state.

AB - Using 4.5 fb-1 of e+e- annihilation data samples collected at the center-of-mass energies ranging from 4.600 GeV to 4.699 GeV with the BESIII detector at the BEPCII collider, a first study of the semileptonic decays Λc+→pK-e+νe, Λc+→Λ(1520)e+νe and Λc+→Λ(1405)e+νe is performed. The Λc+→pK-e+νe decay is observed with a significance of 8.2σ and the branching fraction is measured to be B(Λc+→pK-e+νe)=(0.88±0.17stat±0.07syst)×10-3. We also report evidence of Λc+→Λ(1520)e+νe and Λc+→Λ(1405)e+νe with significances of 3.3σ and 3.2σ, respectively, and measure B(Λc+→Λ(1520)e+νe)=(1.02±0.52stat±0.11syst)×10-3 and B(Λc+→Λ(1405)[→pK-]e+νe)=(0.42±0.19stat±0.04syst)×10-3. Combining these with the inclusive semileptonic Λc+ branching fraction measured by BESIII, the relative fraction is determined to be [B(Λc+→pK-e+νe)/B(Λc+→Xe+νe)]=(2.1±0.4stat±0.2syst)%, which provides a clear confirmation that semileptonic Λc+ decays are not saturated by the Λℓ+νℓ final state.

UR - https://www.elibrary.ru/item.asp?id=59039214

UR - https://www.mendeley.com/catalogue/fd8d75e3-5c24-3476-8982-a901c8361087/

U2 - 10.1103/PhysRevD.106.112010

DO - 10.1103/PhysRevD.106.112010

M3 - Article

VL - 106

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 112010

ER -

ID: 68343670