Measurement of the absolute branching fraction for Λc                         +→Λμ+νμ

BESIII Collaboration

doi:10.1016/j.physletb.2017.01.047

Measurement of the absolute branching fraction for Λ_c ⁺→Λμ⁺ν_μ

BESIII Collaboration

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

Abstract

We report the first measurement of the absolute branching fraction for Λ_c ⁺→Λμ⁺ν_μ. This measurement is based on a sample of e⁺e⁻ annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb⁻¹. The branching fraction is determined to be B(Λ_c ⁺→Λμ⁺ν_μ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λ_c ⁺→Λμ⁺ν_μ)/B(Λ_c ⁺→Λe⁺ν_e) to be 0.96±0.16(stat)±0.04(syst).

Original language	English
Pages (from-to)	42-47
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	767
DOIs	https://doi.org/10.1016/j.physletb.2017.01.047
Publication status	Published - 10 Apr 2017
Externally published	Yes

Keywords

Absolute branching fraction
BESIII
Semi-leptonic decay
Λ

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10.1016/j.physletb.2017.01.047

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@article{95e7f53fbd424fb892c9d3d4338635c7,

title = "Measurement of the absolute branching fraction for Λc +→Λμ+νμ ",

abstract = "We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))\%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).",

keywords = "Absolute branching fraction, BESIII, Semi-leptonic decay, Λ",

author = "\{BESIII Collaboration\} and M. Ablikim and Achasov, \{M. N.\} and S. Ahmed and Ai, \{X. C.\} and O. Albayrak and M. Albrecht and Ambrose, \{D. J.\} and A. Amoroso and An, \{F. F.\} and Q. An and Bai, \{J. Z.\} and O. Bakina and \{Baldini Ferroli\}, R. and Y. Ban and Bennett, \{D. W.\} and Bennett, \{J. V.\} and N. Berger and M. Bertani and D. Bettoni and Bian, \{J. M.\} and F. Bianchi and E. Boger and I. Boyko and Briere, \{R. A.\} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, \{G. F.\} and Cetin, \{S. A.\} and Chang, \{J. F.\} and G. Chelkov and G. Chen and Chen, \{H. S.\} and Chen, \{J. C.\} and Chen, \{M. L.\} and S. Chen and Chen, \{S. J.\} and X. Chen and Chen, \{X. R.\} and Chen, \{Y. B.\} and Chu, \{X. K.\} and G. Cibinetto and Dai, \{H. L.\} and Dai, \{J. P.\} and A. Dbeyssi and D. Dedovich and Deng, \{Z. Y.\} and A. Denig and I. Denysenko",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s)",

year = "2017",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2017.01.047",

language = "English",

volume = "767",

pages = "42--47",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Measurement of the absolute branching fraction for Λc +→Λμ+νμ

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bian, J. M.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, S.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Denysenko, I.

PY - 2017/4/10

Y1 - 2017/4/10

N2 - We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).

AB - We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).

KW - Absolute branching fraction

KW - BESIII

KW - Semi-leptonic decay

KW - Λ

UR - https://www.scopus.com/pages/publications/85011102723

U2 - 10.1016/j.physletb.2017.01.047

DO - 10.1016/j.physletb.2017.01.047

M3 - Article

SN - 0370-2693

VL - 767

SP - 42

EP - 47

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Measurement of the absolute branching fraction for Λ_c ⁺→Λμ⁺ν_μ

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Keywords

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