Электронный каталог

Статья

Ablikim, M.
Precise Measurement of the Branching Fractions of J/*q *> *L^-*p*+*S*- + c.c. and J/*q *> *L^-*p*-*S*+ + c.c. / 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.11. – P.112012. – URL: https://doi.org/10.1103/PhysRevD.108.112012. – Bibliogr.:49.

Based on a data sample of (10087±44)×106  J/ψ events collected with the BESIII detector, the branching fraction of J/ψ→¯Λπ+Σ−+c.c. is measured to be (1.221±0.002±0.038)×10−3, and the branching fraction of its isospin partner mode J/ψ→¯Λπ−Σ++c.c. is measured to be (1.244±0.002±0.045)×10−3 with improved precision. Here the first uncertainties are statistical and the second ones systematic. The isospin symmetry of the Σ baryon in charmonium hadronic decay and the “12% rule” are tested, and no violation is found. The potential of using these channels as Σ baryon sources for nuclear physics research is studied, and the momentum and angular distributions of these sources are provided.



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