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

BESIII Collaboration; M. Ablikim; M.N. Achasov; P. Adlarson; S. Ahmed; M. Albrecht; R. Aliberti; A. Amoroso; Nasser Kalantar-Nayestanaki; Rosa Kappert; Myroslav Kavatsyuk; Johan Messchendorp; Viktor Rodin

doi:10.1103/PhysRevD.103.L091101

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

BESIII Collaboration, M. Ablikim, M.N. Achasov, P. Adlarson, S. Ahmed, M. Albrecht, R. Aliberti, A. Amoroso, Nasser Kalantar-Nayestanaki, Rosa Kappert, Myroslav Kavatsyuk, Johan Messchendorp, Viktor Rodin

Energy and Sustainability Research Institute Groningen

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Abstract

We report on a comparison of two possible Λ+c spin hypotheses, J=12 and 32, 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=12, with this value favored over the 32 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.

Original language	English
Article number	L091101
Number of pages	9
Journal	Physical Review D
Volume	103
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.103.L091101
Publication status	Published - 1-May-2021

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Determination of the Λ + c spin via the reaction e + e − → Λc ̄ΛcFinal publisher's version, 416 KBLicence: CC BY

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@article{8894f117b9d449aaa95dda27a8952a00,

title = "Determination of the Λ+c spin via the reaction e+e− → Λc¯Λc",

abstract = "We report on a comparison of two possible Λ+c spin hypotheses, J=12 and 32, 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=12, with this value favored over the 32 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.",

author = "{BESIII Collaboration} and M. Ablikim and M.N. Achasov and P. Adlarson and S. Ahmed and M. Albrecht and R. Aliberti and A. Amoroso and Nasser Kalantar-Nayestanaki and Rosa Kappert and Myroslav Kavatsyuk and Johan Messchendorp and Viktor Rodin",

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doi = "10.1103/PhysRevD.103.L091101",

language = "English",

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TY - JOUR

T1 - Determination of the Λ+c spin via the reaction e+e− → Λc¯Λc

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M.N.

AU - Adlarson, P.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Aliberti, R.

AU - Amoroso, A.

AU - Kalantar-Nayestanaki, Nasser

AU - Kappert, Rosa

AU - Kavatsyuk, Myroslav

AU - Messchendorp, Johan

AU - Rodin, Viktor

PY - 2021/5/1

Y1 - 2021/5/1

N2 - We report on a comparison of two possible Λ+c spin hypotheses, J=12 and 32, 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=12, with this value favored over the 32 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.

AB - We report on a comparison of two possible Λ+c spin hypotheses, J=12 and 32, 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=12, with this value favored over the 32 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.

U2 - 10.1103/PhysRevD.103.L091101

DO - 10.1103/PhysRevD.103.L091101

M3 - Article

SN - 1550-7998

VL - 103

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - L091101

ER -