Determination of the Λ+c spin via the reaction e+e− → Λc¯Λc
- Ablikim, M.
- Adlarson, Patrik
- Ikegami Andersson, Walter
- Johansson, Tord
- Kupsc, Andrzej
- Pettersson, Joachim
- Schönning, Karin
- Thorén, Viktor
- Wolke, Magnus
- Zou, J. H.
Publication date
January 2021
DOI Publisher
American Physical Society (APS)Abstract
We report on a comparison of two possible Λ+c spin hypotheses, J=½ 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=½, with this value favored over the 3/2 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.103.L091101</p
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