Measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu)
- Ablikim, M.
- Achasov, M. N.
- Ahmed, S.
- Ai, X. C.
- Albayrak, O.
- Albrecht, M.
- Ambrose, D. J.
- Amoroso, A.
- An, F. F.
- An, Q.
- Bai, J. Z.
- Bakina, O.
- Ferroli, R. Baldini
- Ban, Y.
- Bennett, D. W.
- Bennett, J. V.
- Berger, N.
- Bertani, M.
- Bettoni, D.
- Bian, J. M.
- Bianchi, E.
- Boger, E.
- Boyko, I.
- Briere, R. A.
- Cai, H.
- Cai, X.
- Cakir, O.
- Calcaterra, A.
- Cao, G. F.
- Cetin, S. A.
- Chang, J. F.
- Chelkov, G.
- Chen, G.
- Chen, H. S.
- Chen, J. C.
- Chen, M. L.
- Chen, S.
- Chen, S. J.
- Chen, X.
- Chen, X. R.
- Chen, Y. B.
- Chu, X. K.
- Cibinetto, G.
- Dai, H.
DOIAbstract
We report the first measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu).This measurement is based on a sample of e+e(-) annihilation data produced at a center-of-mass energy root 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( Lambda(+)(c) -> Lambda mu(+)nu(mu)) = (3.49 +/- 0.46( stat) +/- 0.27( syst))%. In addition, we calculate the ratio B( Lambda(+)(c) -> Lambda mu(+)nu(mu))/B(Lambda(+)(c) -> Lambda e(+)nu(e) to be 0.96 +/- 0.16( stat) +/- 0.04( syst). (C) 2017 The Author(s). Published by Elsevier B.V.National Key Basic Research Program of China [2015CB8...
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