Measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda mu(+)nu(mu)

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...

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Bibliographic Details
Published in:Physics letters. B 2017, Vol.767, p.42
Main Authors: Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., An, F. F., An, Q., Ban, Y., Bian, J. M., Bianchi, E., Cai, H., Chelkov, G., Chen, G., Chen, J. C., Chen, X. R., Chu, X. K., Cibinetto, G., Dai, H. L., Dbeyssi, A., Dedovich, D., Denig, A., Denysenko, I., Dong, C., Fang, X., Fava, L., Feldbauer, E., Feng, C. Q., Fritsch, M., Greco, M., Guan, Y. H., Guo, L. B., Holtmann, T., Hu, C., Huang, X. T., Hussain, T., Ji, Q. P., Jin, S., Ke, B. C., Kornicer, M., Kupsc, Andrzej, Leng, C., Li, F., Li, H. B., Li, J. C., Li, Q. Y., Li, Y. B., Liang, H., Liang, Y. F., Liao, G. R., Liu, B., Liu, H. B., Liu, H. H., Liu, Y. B., Luo, T., Maggiora, M., Marcello, S., Min, T. J., Mo, Y. J., Muchnoi, N. Yu, Musiol, R., Nikolaev, I. B., Nisar, S., Olsen, S. L., Peters, K., Qiao, C. F., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Schönning, Karin, Sun, J. F., Sun, S. S., Tang, X., Tapan, I., Tiemens, M., Uman, I., Varner, G. S., Wang, L. S., Wang, Z., Wang, Z. G., Xiu, Q. L., Xu, X. P., Yu, C. X., Zafar, A. A., Zhang, J. J., Zhang, J. L., Zhang, J. Q., Zhang, J. Z., Zhang, S. Q., Zhang, Y., Zhang, Z. H., Zhang, Z. Y., Zhao, Ling, Zhao, Q. W., Zhao, Z. G., Zheng, B., Zhong, B., Zhu, K. J., Zou, B. S.
Format: Article
Language:English
Subjects:
Absolute branching fraction
BESIII
Lambda(+)(c)
Semi-leptonic decay
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Summary: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).
ISSN:1873-2445
0370-2693
DOI:10.1016/j.physletb.2017.01.047