Search for $\barΛ$-$Λ$ oscillations in the decay $J/ψ\to p K^- \barΛ+c.c.$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Ahmed, S.
name: Albrecht, M.
name: Aliberti, R.
name: Amoroso, A.
name: An, Q.
name: Bai, Y.
name: Bakina, O.
name: Ferroli, R. Baldini
name: Balossino, I.
name: Ban, Y.
name: Begzsuren, K.
name: Berger, N.
name: Bertani, M.
name: Bettoni, D.
name: Bianchi, F.
name: Bloms, J.
name: Bortone, A.
name: Boyko, I.
name: Briere, R. A.
name: Cai, H.
name: Cai, X.
name: Calcaterra, A.
name: Cao, G. F.
name: Cao, N.
name: Cetin, S. A.
name: Chang, J. F.
name: Chang, W. L.
name: Chelkov, G.
name: Chen, G.
name: Chen, H. S.
name: Chen, M. L.
name: Chen, S. J.
name: Chen, X. R.
name: Chen, Y. B.
name: Chen, Z. J.
name: Cheng, W. S.
name: Cibinetto, G.
name: Cossio, F.
name: Dai, H. L.
name: Dai, J. P.
name: Dai, X. C.
name: Dbeyssi, A.
name: de Boer, R. E.
name: Dedovich, D.
name: Deng, Z. Y.
name: Denig, A.
name: Denysenko, I.
name: Destefanis, M.
name: De Mori, F.
name: Ding, Y.
name: Dong, J.
name: Dong, L. Y.
name: Dong, M. Y.
name: Dong, X.
name: Du, S. X.
name: Fang, J.
name: Fang, S. S.
name: Fang, Y.
name: Farinelli, R.
name: Fava, L.
name: Feldbauer, F.
name: Felici, G.
name: Feng, C. Q.
name: Fritsch, M.
name: Fu, C. D.
name: Gao, Y. N.
name: Gao, Ya
name: Gao, Yang
name: Garzia, I.
name: Gersabeck, E. M.
name: Gilman, A.
name: Goetzen, K.
name: Gong, L.
name: Gong, W. X.
name: Gradl, W.
name: Greco, M.
name: Gu, L. M.
name: Gu, M. H.
name: Gu, S.
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name: Guan, C. Y
name: Guo, A. Q.
name: Guo, L. B.
name: Guo, R. P.
name: Guo, Y. P.
name: Guskov, A.
name: Han, T. T.
name: Hao, X. Q.
name: Harris, F. A.
name: He, K. L.
name: Heinsius, F. H. H.
name: Heinz, C. H.
name: Heng, Y. K.
name: Herold, C.
name: Himmelreich, M.
name: Holtmann, T.
name: Hou, Y. R.
name: Hou, Z. L.
name: Hu, H. M.
name: Hu, J. F.
name: Hu, T.
name: Hu, Y.
name: Huang, G. S.
name: Huang, L. Q.
name: Huang, X. T.
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name: Hussain, T.
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name: Ji, Q.
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name: Ji, X. L.
name: Jiang, X. S.
name: Jiao, J. B.
name: Jiao, Z.
name: Jin, S.
name: Jin, Y.
name: Johansson, T.
name: Kalantar-Nayestanaki, N.
name: Kang, X. S.
name: Kappert, R.
name: Kavatsyuk, M.
name: Ke, B. C.
name: Keshk, I. K.
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name: Lavezzi, L.
name: Lei, Z. H.
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name: Lenz, T.
name: Li, C.
name: Li, C. H.
name: Li, Cheng
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name: Liang, Y. F.
name: Liang, Y. T.
name: Liao, G. R.
name: Liao, L. Z.
name: Libby, J.
name: Limphirat, A.
name: Liu, B. J.
name: Liu, C. X.
name: Liu, D.
name: Liu, F. H.
name: Liu, Fang
name: Liu, Feng
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name: Liu, H. M.
name: Liu, Huanhuan
name: Liu, Huihui
name: Liu, J. B.
name: Liu, J. Y.
name: Liu, K.
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name: Liu, L.
name: Liu, M. H.
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name: Liu, Shuai
name: Liu, T.
name: Liu, W. M.
name: Liu, X.
name: Liu, Y. B.
name: Liu, Z. A.
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name: Malik, Q. A.
name: Mangoni, A.
name: Mao, Y. J.
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name: Marcello, S.
name: Meng, Z. X.
name: Messchendorp, J. G.
name: Mezzadri, G.
name: Min, T. J.
name: Mitchell, R. E.
name: Mo, X. H.
name: Muchnoi, N. Yu.
name: Muramatsu, H.
name: Nakhoul, S.
name: Nefedov, Y.
name: Nerling, F.
name: Nikolaev, I. B.
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name: Olsen, S. L.
name: Ouyang, Q.
name: Pacetti, S.
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name: Pathak, A.
name: Patteri, P.
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name: Peng, H. P.
name: Peters, K.
name: Ping, J. L.
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name: Ravindran, K.
name: Redmer, C. F.
name: Rivetti, A.
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name: Rolo, M.
name: Rong, G.
name: Rosner, Ch.
name: Sarantsev, A.
name: Schelhaas, Y.
name: Schnier, C.
name: Schoenning, K.
name: Scodeggio, M.
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name: Zafar, A. A.
name: Zeng, Y.
name: Zhang, B. X.
name: Zhang, G. Y.
name: Zhang, H.
name: Zhang, H. H.
name: Zhang, H. H.
name: Zhang, H. Y.
name: Zhang, J. J.
name: Zhang, J. Q.
name: Zhang, J. W.
name: Zhang, J. Y.
name: Zhang, J. Z.
name: Zhang, Jianyu
name: Zhang, Jiawei
name: Zhang, Lei
name: Zhang, S. F.
name: Zhang, X. D.
name: Zhang, X. Y.
name: Zhang, Y.
name: Zhang, Y. T.
name: Zhang, Y. H.
name: Zhang, Yan
name: Zhang, Yao
name: Zhang, Z. Y.
name: Zhao, G.
name: Zhao, J.
name: Zhao, J. Y.
name: Zhao, J. Z.
name: Zhao, Lei
name: Zhao, Ling
name: Zhao, M. G.
name: Zhao, Q.
name: Zhao, S. J.
name: Zhao, Y. B.
name: Zhao, Y. X.
name: Zhao, Z. G.
name: Zhemchugov, A.
name: Zheng, B.
name: Zheng, J. P.
name: Zheng, Y. H.
name: Zhong, B.
name: Zhong, C.
name: Zhou, L. P.
name: Zhou, Q.
name: Zhou, X.
name: Zhou, X. K.
name: Zhou, X. R.
name: Zhu, A. N.
name: Zhu, J.
name: Zhu, K.
name: Zhu, K. J.
name: Zhu, S. H.
name: Zhu, W. J.
name: Zhu, W. J.
name: Zhu, Y. C.
name: Zhu, Z. A.
name: Zou, B. S.
name: Zou, J. H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the first search for $\barΛ$--$Λ$ oscillations in the decay $J/ψ\to p K^- \barΛ + c.c.$ by analyzing $1.31\times10^9$ $J/ψ$ events accumulated with the BESIII detector at the BEPCII collider. The $J/ψ$ events are produced using $e^+e^-$ collisions at a center of mass energy $\sqrt{s}= 3.097$~GeV. No evidence for hyperon oscillations is observed. The upper limit for the oscillation rate of $\barΛ$ to $Λ$ hyperons is determined to be $\mathcal{P}(Λ)=\frac{\mathcal{B}(J/ψ\to pK^-Λ+c.c.)}{\mathcal{B}(J/ψ\to pK^-\barΛ+c.c.)}&lt;4.4\times10^{-6}$ corresponding to an oscillation parameter $δm_{Λ\barΛ}$ of less than $3.8\times10^{-18}$~GeV at the 90\% confidence level.
description: 7 pages, 1 figure