Study of Λc+→Λμ+νμ and test of lepton flavor universality with Λc+→Λℓ+νℓ decays

Standard

Study of Λc+→Λμ+νμ and test of lepton flavor universality with Λc+→Λℓ+νℓ decays. / BESIII Collaboration ; Николаев, Иван Борисович ; Мучной, Николай Юрьевич.

In: Physical Review D, Vol. 108, No. 3, 031105, 18.08.2023.

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

BibTeX

@article{bb90bfd95d6249aea2a6bb394f65d00a,

title = "Study of Λc+→Λμ+νμ and test of lepton flavor universality with Λc+→Λℓ+νℓ decays",

abstract = "The study of the Cabibbo-favored semileptonic decay Λc+→Λμ+νμ is reported using 4.5 fb-1 of e+e- annihilation data collected at center-of-mass energies ranging from 4.600 to 4.699 GeV. The branching fraction of the decay is measured to be B(Λc+→Λμ+νμ)=(3.48±0.14stat±0.10syst)%, 3 times more precise than the prior world average result. Tests of lepton flavor universality using Λc+→Λℓ+νℓ (ℓ=e, μ) decays are reported for the first time, based on measurements of the differential decay rates and the forward-backward asymmetries in separate four-momentum transfer regions. The results are compatible with Standard Model predictions. Furthermore, we improve the determination of the form-factor parameters in Λc+→Λℓ+νℓ decays, which provide stringent tests and calibration for lattice quantum chromodynamics calculations.",

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

note = "Study of Λc+→Λμ+νμ and test of lepton flavor universality with Λc+→Λℓ+νℓ decays / M. Ablikim, M. N. Achasov, P. Adlarson [et al.] // Physical Review D. – 2023. – Vol. 108, No. 3. – P. L031105. – DOI 10.1103/physrevd.108.l031105.",

year = "2023",

month = aug,

day = "18",

doi = "10.1103/PhysRevD.108.L031105",

language = "English",

volume = "108",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "3",

}

RIS

TY - JOUR

T1 - Study of Λc+→Λμ+νμ and test of lepton flavor universality with Λc+→Λℓ+νℓ decays

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

N1 - Study of Λc+→Λμ+νμ and test of lepton flavor universality with Λc+→Λℓ+νℓ decays / M. Ablikim, M. N. Achasov, P. Adlarson [et al.] // Physical Review D. – 2023. – Vol. 108, No. 3. – P. L031105. – DOI 10.1103/physrevd.108.l031105.

PY - 2023/8/18

Y1 - 2023/8/18

N2 - The study of the Cabibbo-favored semileptonic decay Λc+→Λμ+νμ is reported using 4.5 fb-1 of e+e- annihilation data collected at center-of-mass energies ranging from 4.600 to 4.699 GeV. The branching fraction of the decay is measured to be B(Λc+→Λμ+νμ)=(3.48±0.14stat±0.10syst)%, 3 times more precise than the prior world average result. Tests of lepton flavor universality using Λc+→Λℓ+νℓ (ℓ=e, μ) decays are reported for the first time, based on measurements of the differential decay rates and the forward-backward asymmetries in separate four-momentum transfer regions. The results are compatible with Standard Model predictions. Furthermore, we improve the determination of the form-factor parameters in Λc+→Λℓ+νℓ decays, which provide stringent tests and calibration for lattice quantum chromodynamics calculations.

AB - The study of the Cabibbo-favored semileptonic decay Λc+→Λμ+νμ is reported using 4.5 fb-1 of e+e- annihilation data collected at center-of-mass energies ranging from 4.600 to 4.699 GeV. The branching fraction of the decay is measured to be B(Λc+→Λμ+νμ)=(3.48±0.14stat±0.10syst)%, 3 times more precise than the prior world average result. Tests of lepton flavor universality using Λc+→Λℓ+νℓ (ℓ=e, μ) decays are reported for the first time, based on measurements of the differential decay rates and the forward-backward asymmetries in separate four-momentum transfer regions. The results are compatible with Standard Model predictions. Furthermore, we improve the determination of the form-factor parameters in Λc+→Λℓ+νℓ decays, which provide stringent tests and calibration for lattice quantum chromodynamics calculations.

UR - https://www.elibrary.ru/item.asp?id=63085899

UR - https://www.mendeley.com/catalogue/50ace4dd-9f0a-3015-a200-e1eb219f283f/

U2 - 10.1103/PhysRevD.108.L031105

DO - 10.1103/PhysRevD.108.L031105

M3 - Article

VL - 108

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 3

M1 - 031105

ER -

ID: 68348297