Search for Λ ¯ - Λ Baryon-Number-Violating Oscillations in the Decay J/ψ →pK- Λ ¯ + c. c

(BESIII Collaboration)

doi:10.1103/PhysRevLett.131.121801

Search for Λ ¯ - Λ Baryon-Number-Violating Oscillations in the Decay J/ψ →pK- Λ ¯ + c. c

(BESIII Collaboration)

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We report on the first search for Λ¯-Λ oscillations in the decay J/ψ→pK-Λ¯+c.c. by analyzing 1.31×109 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 s=3.097 GeV. No evidence for hyperon oscillations is observed. The upper limit for the oscillation rate of Λ¯ to Λ hyperons is determined to be P(Λ)=[B(J/ψ→pK-Λ+c.c.)/B(J/ψ→pK-Λ¯+c.c.)]<4.4×10-6 corresponding to an oscillation parameter δmΛΛ¯ of less than 3.8×10-18 GeV at the 90% confidence level.

Original language	English (US)
Article number	121801
Journal	Physical review letters
Volume	131
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.131.121801
State	Published - Sep 22 2023

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© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

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@article{b3aab9143b3b4869abab9757e1e58f74,

title = "Search for Λ ¯ - Λ Baryon-Number-Violating Oscillations in the Decay J/ψ →pK- Λ ¯ + c. c",

abstract = "We report on the first search for Λ¯-Λ oscillations in the decay J/ψ→pK-Λ¯+c.c. by analyzing 1.31×109 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 s=3.097 GeV. No evidence for hyperon oscillations is observed. The upper limit for the oscillation rate of Λ¯ to Λ hyperons is determined to be P(Λ)=[B(J/ψ→pK-Λ+c.c.)/B(J/ψ→pK-Λ¯+c.c.)]<4.4×10-6 corresponding to an oscillation parameter δmΛΛ¯ of less than 3.8×10-18 GeV at the 90\% confidence level.",

author = "\{(BESIII Collaboration)\} and M. Ablikim and Achasov, \{M. N.\} and P. Adlarson and S. Ahmed and M. Albrecht and R. Aliberti and A. Amoroso and Q. An and Y. Bai and O. Bakina and Ferroli, \{R. Baldini\} and I. Balossino and Y. Ban and K. Begzsuren and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and J. Bloms and A. Bortone and I. Boyko and Briere, \{R. A.\} and H. Cai and X. Cai and A. Calcaterra and Cao, \{G. F.\} and N. Cao and Cetin, \{S. A.\} and Chang, \{J. F.\} and Chang, \{W. L.\} and G. Chelkov and G. Chen and Chen, \{H. S.\} and Chen, \{M. L.\} and Chen, \{S. J.\} and Chen, \{X. R.\} and Chen, \{Y. B.\} and Chen, \{Z. J.\} and Cheng, \{W. S.\} and G. Cibinetto and F. Cossio and Dai, \{H. L.\} and Dai, \{J. P.\} and Dai, \{X. C.\} and A. Dbeyssi and \{De Boer\}, \{R. E.\} and D. Dedovich and Deng, \{Z. Y.\} and H. Muramatsu and R. Poling",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2023",

month = sep,

day = "22",

doi = "10.1103/PhysRevLett.131.121801",

language = "English (US)",

volume = "131",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "12",

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TY - JOUR

T1 - Search for Λ ¯ - Λ Baryon-Number-Violating Oscillations in the Decay J/ψ →pK- Λ ¯ + c. c

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 - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Ferroli, R. Baldini

AU - Balossino, I.

AU - Ban, Y.

AU - Begzsuren, K.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Bloms, J.

AU - Bortone, A.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cao, N.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chang, W. L.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chen, Z. J.

AU - Cheng, W. S.

AU - Cibinetto, G.

AU - Cossio, F.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dai, X. C.

AU - Dbeyssi, A.

AU - De Boer, R. E.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Muramatsu, H.

AU - Poling, R.

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2023/9/22

Y1 - 2023/9/22

N2 - We report on the first search for Λ¯-Λ oscillations in the decay J/ψ→pK-Λ¯+c.c. by analyzing 1.31×109 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 s=3.097 GeV. No evidence for hyperon oscillations is observed. The upper limit for the oscillation rate of Λ¯ to Λ hyperons is determined to be P(Λ)=[B(J/ψ→pK-Λ+c.c.)/B(J/ψ→pK-Λ¯+c.c.)]<4.4×10-6 corresponding to an oscillation parameter δmΛΛ¯ of less than 3.8×10-18 GeV at the 90% confidence level.

AB - We report on the first search for Λ¯-Λ oscillations in the decay J/ψ→pK-Λ¯+c.c. by analyzing 1.31×109 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 s=3.097 GeV. No evidence for hyperon oscillations is observed. The upper limit for the oscillation rate of Λ¯ to Λ hyperons is determined to be P(Λ)=[B(J/ψ→pK-Λ+c.c.)/B(J/ψ→pK-Λ¯+c.c.)]<4.4×10-6 corresponding to an oscillation parameter δmΛΛ¯ of less than 3.8×10-18 GeV at the 90% confidence level.

UR - https://www.scopus.com/pages/publications/85175585898

UR - https://www.scopus.com/pages/publications/85175585898#tab=citedBy

U2 - 10.1103/PhysRevLett.131.121801

DO - 10.1103/PhysRevLett.131.121801

M3 - Article

C2 - 37802947

AN - SCOPUS:85175585898

SN - 0031-9007

VL - 131

JO - Physical review letters

JF - Physical review letters

IS - 12

M1 - 121801

ER -

Search for Λ ¯ - Λ Baryon-Number-Violating Oscillations in the Decay J/ψ →pK- Λ ¯ + c. c

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