Improved measurement of the absolute branching fraction of inclusive semileptonic Λc+ decay

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Improved measurement of the absolute branching fraction of inclusive semileptonic Λc+ decay. / BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

In: Physical Review D, Vol. 107, No. 5, 052005, 17.03.2023.

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

BibTeX

@article{e75b2d8bba6c49349fa638fb4b09e2b6,

title = "Improved measurement of the absolute branching fraction of inclusive semileptonic Λc+ decay",

abstract = "Using 4.5 fb-1 of e+e- annihilation data samples collected at center-of-mass energies ranging from 4.600 to 4.698 GeV with the BESIII detector at the BEPCII collider, we measured the absolute branching fraction for the inclusive semileptonic decay Λc+→Xe+νe, where X refers to any possible particle system. The branching fraction of the decay is determined to be B(Λc+→Xe+νe)=(4.06±0.10stat±0.09syst)%. Our result improves the precision of previous measurements of B(Λc+→Xe+νe) by more than threefold. Using the known Λc+ lifetime and the charge-averaged semileptonic decay width of nonstrange charmed mesons, we measure the ratio of inclusive semileptonic decay widths Γ(Λc+→Xe+νe)/Γ¯(D→Xe+νe)=1.28±0.05, where statistical and systematic uncertainties are combined.",

author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "Improved measurement of the absolute branching fraction of inclusive semileptonic Λc+ decay / BESIII Collaboration // Physical Review D. – 2023. – Vol. 107, No. 5. – P. 052005. – DOI 10.1103/physrevd.107.052005. ",

year = "2023",

month = mar,

day = "17",

doi = "10.1103/PhysRevD.107.052005",

language = "English",

volume = "107",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "5",

}

RIS

TY - JOUR

T1 - Improved measurement of the absolute branching fraction of inclusive semileptonic Λc+ decay

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Improved measurement of the absolute branching fraction of inclusive semileptonic Λc+ decay / BESIII Collaboration // Physical Review D. – 2023. – Vol. 107, No. 5. – P. 052005. – DOI 10.1103/physrevd.107.052005.

PY - 2023/3/17

Y1 - 2023/3/17

N2 - Using 4.5 fb-1 of e+e- annihilation data samples collected at center-of-mass energies ranging from 4.600 to 4.698 GeV with the BESIII detector at the BEPCII collider, we measured the absolute branching fraction for the inclusive semileptonic decay Λc+→Xe+νe, where X refers to any possible particle system. The branching fraction of the decay is determined to be B(Λc+→Xe+νe)=(4.06±0.10stat±0.09syst)%. Our result improves the precision of previous measurements of B(Λc+→Xe+νe) by more than threefold. Using the known Λc+ lifetime and the charge-averaged semileptonic decay width of nonstrange charmed mesons, we measure the ratio of inclusive semileptonic decay widths Γ(Λc+→Xe+νe)/Γ¯(D→Xe+νe)=1.28±0.05, where statistical and systematic uncertainties are combined.

AB - Using 4.5 fb-1 of e+e- annihilation data samples collected at center-of-mass energies ranging from 4.600 to 4.698 GeV with the BESIII detector at the BEPCII collider, we measured the absolute branching fraction for the inclusive semileptonic decay Λc+→Xe+νe, where X refers to any possible particle system. The branching fraction of the decay is determined to be B(Λc+→Xe+νe)=(4.06±0.10stat±0.09syst)%. Our result improves the precision of previous measurements of B(Λc+→Xe+νe) by more than threefold. Using the known Λc+ lifetime and the charge-averaged semileptonic decay width of nonstrange charmed mesons, we measure the ratio of inclusive semileptonic decay widths Γ(Λc+→Xe+νe)/Γ¯(D→Xe+νe)=1.28±0.05, where statistical and systematic uncertainties are combined.

UR - https://www.elibrary.ru/item.asp?id=61532001

UR - https://www.mendeley.com/catalogue/009d6e6e-9b7c-3f77-aa53-9f7fea3952ba/

U2 - 10.1103/PhysRevD.107.052005

DO - 10.1103/PhysRevD.107.052005

M3 - Article

VL - 107

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 5

M1 - 052005

ER -

ID: 68345133