Электронный каталог

Статья

Ablikim, M.
Search for Baryon and Lepton Number Violating Decays of *X*0 Hyperons / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, S.Pogodin, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review D [Electronic resource]. – 2023. – Vol.108, No.1. – P.012006. – URL: https://doi.org/10.1103/PhysRevD.108.012006. – Bibliogr.:37.

Using (1.0087±0.0044)×1010  J/ψ events collected by the BESIII detector at the BEPCII collider, we report the first search for the baryon and lepton number violating decays Ξ0→K−e+ with Δ(B−L)=0 and Ξ0→K+e− with |Δ(B−L)|=2, where B (L) is the baryon (lepton) number. While no signal is observed, the upper limits on the branching fractions of these two decays are set to B(Ξ0→K−e+)<3.6×10−6 and B(Ξ0→K+e−)<1.9×10−6 at the 90% confidence level, respectively. These results offer a direct probe of baryon number violating interactions involving a strange quark.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки