Observation of the Narrow Structure near the pΛbar Threshold
The BESIII collaboration has recently reported the observation of a narrow structure near the pΛbar threshold in the e+e-→pK-Λbar+c.c. process. Its quantum number JP is determined for the first time and the resonance parameters are also determined. The detailed results have been published in the journal Physical Review Letters 131, 151901 on Oct. 10 2023.
Search for Λ-Λbar Baryon-Number-Violating Oscillations
The BESIII collaboration has recently presented their results on searching for oscillations between Λbar and Λ in the decay Jpsi to p K- Λbar +c.c. This is the first constraint on the rate of hyperon-anti-hyperon oscillations. The detailed results have been published in the journal Physical Review Letters 131, 121801 on Sep. 19 2023.