Refine
Year of publication
Language
- English (281)
Has Fulltext
- yes (281)
Is part of the Bibliography
- no (281)
Keywords
- BESIII (16)
- e +-e − Experiments (12)
- Branching fraction (8)
- Particle and Resonance Production (6)
- Charm Physics (5)
- Spectroscopy (5)
- Charmonium (4)
- Hadronic decays (4)
- Lepton colliders (4)
- Branching fractions (3)
Institute
- Physik (278)
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 𝛿𝑚Λ¯Λ of less than 3.8×10−18 GeV at the 90% confidence level.