Электронный каталог

Статья

Ablikim, M.
Improved Measurement of the Absolute Branching Fraction of Inclusive Semileptonic *L*+&sub(c) Decay / 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.107, No.5. – P. 052005. – URL: https://doi.org/10.1103/PhysRevD.107.052005. – Bibliogr.: 34.

Using of annihilation data samples collected at center-of-mass energies ranging from 4.600 to 4.698 GeV with the BESIII detector at the BEPCII collider, we measured the absolute branching fraction for the inclusive semileptonic decay , where refers to any possible particle system. The branching fraction of the decay is determined to be . Our result improves the precision of previous measurements of by more than threefold. Using the known lifetime and the charge-averaged semileptonic decay width of nonstrange charmed mesons, we measure the ratio of inclusive semileptonic decay widths , where statistical and systematic uncertainties are combined.



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