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...
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| Vydáno v: | Physical review. D Ročník 103; číslo 9; s. 1 |
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| Hlavní autoři: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
College Park
American Physical Society
01.05.2021
American Physical Society (APS) |
| Témata: | |
| ISSN: | 2470-0010, 2470-0029, 2470-0029 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | 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. |
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| Bibliografie: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 FG02-05ER41374; SC0012069 None USDOE Office of Science (SC) |
| ISSN: | 2470-0010 2470-0029 2470-0029 |
| DOI: | 10.1103/PhysRevD.103.L091101 |