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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Published in:Physical review. D Vol. 103; no. 9; p. 1
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: Journal Article
Language:English
Published: College Park American Physical Society 01.05.2021
American Physical Society (APS)
Subjects:
Astronomy & Astrophysics
Hypotheses
Luminosity
Particle properties
Physics
Spin
Strong interaction
ISSN:2470-0010, 2470-0029, 2470-0029
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Abstract 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.
AbstractList 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 pK 0 S , Λπ + , Σ 0 π + , and Σ + π 0 . 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.
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.
We report on a comparison of two possible $Λ^{+}_{c}$ spin hypotheses, J = $\frac{1}{2}$ and $\frac{3}{2}$, via the process e+e– → $Λ^{+}_{c}\bar{Λ}^{-}_{c}$, using the angular distributions of $Λ^{+}_{c}$ decays into $pK^{0}_{S}$, 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 $J = \frac{1}{2}$, with this value favored over the $\frac{3}{2}$ hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.
ArticleNumber L091101
Author Albrecht, M.
Chen, M. L.
Aliberti, R.
Fang, S. S.
Fava, L.
Dong, M. Y.
Chang, J. F.
Cetin, S. A.
Gao, Y.
Gu, S.
Denig, A.
Gu, M. H.
Ge, P. T.
Feng, C. Q.
Bloms, J.
Dong, J.
Cai, H.
Dbeyssi, A.
Bakina, O.
Gu, L. M.
Chen, Y. B.
Fang, J.
Guo, L. B.
Bai, X. H.
Garzia, I.
Han, T. T.
An, Q.
Ding, Y.
Cheng, W. S.
Han, W. Y.
Guskov, A.
Bianchi, F.
Achasov, M. N.
Fu, C. D.
de Boer, R. E.
Guo, R. P.
Harris, F. A.
Boyko, I.
Feng, J. H.
Felici, G.
Bertani, M.
Destefanis, M.
Amoroso, A.
Gong, W. X.
Dong, C.
Fang, Y.
Balossino, I.
Ferroli, R. Baldini
Ahmed, S.
Dong, L. Y.
Chelkov, G.
Chen, S. J.
De Mori, F.
Berger, N.
Chen, Z. J.
Fritsch, M.
Chen, D. Y.
Bettoni, D.
Guan, C. Y.
Cui, X. F.
Chen, H. S.
Briere, R. A.
Dedovich, D.
Denysenko, I.
Chen, X. R.
Fan, Y. L.
Gong, L.
Greco, M.
Feldbauer, F.
Adlarson, P.
Deng, Z. Y.
Guo, Y. P.
Gersabeck, E. M.
Cao, N.
Gao, Y. G.
Calcaterra, A.
Dai, X. C.
Goetzen, K.
Gradl, W.
Gu, Y. T.
Geng, C.
Hao, X. Q.
Begzsuren, K.
Cai, X.
Dai, H. L.
Ban, Y.
Chen, G.
Du, S. X.
Cibinetto, G.
Ablikim, M.
Bortone, A.
Cao, G. F.
Bai, Y.
Gilman, A.
Farinelli, R.
Guo, A. Q.
C
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Copyright Copyright American Physical Society May 1, 2021
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CorporateAuthor BESIII Collaboration
Indiana Univ., Bloomington, IN (United States)
Univ. of Minnesota, Minneapolis, MN (United States)
CorporateAuthor_xml – name: BESIII Collaboration
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None
USDOE Office of Science (SC)
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PublicationCentury 2000
PublicationDate 20210501
PublicationDateYYYYMMDD 2021-05-01
PublicationDate_xml – month: 05
  year: 2021
  text: 20210501
  day: 01
PublicationDecade 2020
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PublicationTitle Physical review. D
PublicationYear 2021
Publisher American Physical Society
American Physical Society (APS)
Publisher_xml – name: American Physical Society
– name: American Physical Society (APS)
References PhysRevD.103.L091101Cc15R1
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PhysRevD.103.L091101Cc17R1
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Snippet 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...
We report on a comparison of two possible $Λ^{+}_{c}$ spin hypotheses, J = $\frac{1}{2}$ and $\frac{3}{2}$, via the process e+e– → $Λ^{+}_{c}\bar{Λ}^{-}_{c}$,...
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...
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StartPage 1
SubjectTerms Astronomy & Astrophysics
Hypotheses
Luminosity
Particle properties
Physics
Spin
Strong interaction
Title Determination of the Λ c + spin via the reaction e + e − → Λ c Λ ¯ c
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Volume 103
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