Determination of the Λ c + spin via the reaction e + e − → Λ c Λ ¯ c

We report on a comparison of two possible Λ+c spin hypotheses, J = 1/2 and 3/2, via the process e+e− → Λ+ c¯Λ−c , using the angular distributions of Λ+c decays into pK0S , Λπ+, Σ0π+, and Σ+π0. The data were recorded at √ s = 4.6 GeV with the BESIII detector and correspond to an integrated luminosity...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D 2021-05, Vol.103 (9), p.1, Article L091101
Main Authors: Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., Amoroso, A., An, M. R., An, Q., Bai, X. H., Bai, Y., Bakina, O., Ferroli, R. Baldini, Balossino, I., Ban, Y., Begzsuren, K., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Bloms, J., Bortone, A., Boyko, I., Briere, R. A., Cai, H., Cai, X., Calcaterra, A., Cao, G. F., Cao, N., Cetin, S. A., Chang, J. F., Chang, W. L., Chelkov, G., Chen, D. Y., Chen, G., Chen, H. S., Chen, M. L., Chen, S. J., Chen, X. R., Chen, Y. B., Chen, Z. J., Cheng, W. S., Cibinetto, G., Cossio, F., Cui, X. F., Dai, H. L., Dai, X. C., Dbeyssi, A., de Boer, R. E., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., De Mori, F., Ding, Y., Dong, C., Dong, J., Dong, L. Y., Dong, M. Y., Dong, X., Du, S. X., Fan, Y. L., Fang, J., Fang, S. S., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C. Q., Feng, J. H., Fritsch, M., Fu, C. D., Gao, Y., Gao, Y. G., Garzia, I., Ge, P. T., Geng, C., Gersabeck, E. M., Gilman, A., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, L. M., Gu, M. H., Gu, S., Gu, Y. T., Guan, C. Y., Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y. P., Guskov, A., Han, T. T., Han, W. Y., Hao, X. Q., Harris, F. A.
Format: Article
Language:English
Subjects:
Astronomy & Astrophysics
Hypotheses
Luminosity
Particle properties
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Spin
Strong interaction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report on a comparison of two possible Λ+c spin hypotheses, J = 1/2 and 3/2, via the process e+e− → Λ+ c¯Λ−c , using the angular distributions of Λ+c decays into pK0S , Λπ+, Σ0π+, and Σ+π0. The data were recorded at √ s = 4.6 GeV with the BESIII detector and correspond to an integrated luminosity of 587 pb−1. The Λ+c spin is determined to be J = 1/2, with this value favored over the 3/2 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.
ISSN:2470-0010
2470-0029
2470-0029
DOI:10.1103/PhysRevD.103.L091101