TY - JOUR

T1 - Search for Λ[over ¯]-Λ Baryon-Number-Violating Oscillations in the Decay J/ψ→pK^{-}Λ[over ¯]+c.c

AU - BESIII Collaboration

AU - Achasov, M N

AU - Chen, S J

AU - Nikolaev, I B

AU - Мучной, Николай Юрьевич

N1 - Search for Λ¯−Λ Baryon-Number-Violating Oscillations in the Decay J/ψ→pK−Λ¯+c.c. / BESIII Collaboration // Physical Review Letters. – 2023. – Vol. 131, No. 12. – P. 121801. – DOI 10.1103/physrevlett.131.121801.

PY - 2023/9/22

Y1 - 2023/9/22

N2 - We report on the first search for Λ[over ¯]-Λ oscillations in the decay J/ψ→pK^{-}Λ[over ¯]+c.c. by analyzing 1.31×10^{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 Λ[over ¯] to Λ hyperons is determined to be P(Λ)=[B(J/ψ→pK^{-}Λ+c.c.)/B(J/ψ→pK^{-}Λ[over ¯]+c.c.)]<4.4×10^{-6} corresponding to an oscillation parameter δm_{ΛΛ[over ¯]} of less than 3.8×10^{-18}  GeV at the 90% confidence level.

AB - We report on the first search for Λ[over ¯]-Λ oscillations in the decay J/ψ→pK^{-}Λ[over ¯]+c.c. by analyzing 1.31×10^{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 Λ[over ¯] to Λ hyperons is determined to be P(Λ)=[B(J/ψ→pK^{-}Λ+c.c.)/B(J/ψ→pK^{-}Λ[over ¯]+c.c.)]<4.4×10^{-6} corresponding to an oscillation parameter δm_{ΛΛ[over ¯]} of less than 3.8×10^{-18}  GeV at the 90% confidence level.

UR - https://pubmed.ncbi.nlm.nih.gov/37802947/

UR - https://www.elibrary.ru/item.asp?id=63171521

U2 - 10.1103/PhysRevLett.131.121801

DO - 10.1103/PhysRevLett.131.121801

M3 - Article

C2 - 37802947

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 12

M1 - 121801

ER -