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 | |
| State | Published - Sep 22 2023 |
Bibliographical note
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.