Электронный каталог

Статья

Ablikim, M.
Updated Measurements of the M1 Transition *q(3686)*>*g*h&sub(c)(2S) with *h&sub(c)(2S)*>KK^-*p / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review D [Electronic resource]. – 2024. – Vol. 109, No. 3. – P. 032004. – URL: https://doi.org/10.1103/PhysRevD.109.032004. – Bibliogr.: 37.

Based on a data sample of (2712.4±14.3)×106ψ(3686) events collected with the BESIII detector at the BEPCII collider, the M1 transition ψ(3686)→γηc(2S) with ηc(2S)→K¯Kπ is studied, where K¯Kπ is K+K−π0 or K0SK±π∓. The mass and width of the ηc(2S) are measured to be (3637.8±0.8(stat)±0.2(syst))  MeV/c2 and (10.5±1.7(stat)±3.5(syst))  MeV, respectively. The product branching fraction B(ψ(3686)→γηc(2S))×B(ηc(2S)→K¯Kπ) is determined to be (0.97±0.06(stat)±0.09(syst))×10−5. Using B(ηc(2S)→K¯Kπ)=(1.86+0.68−0.49)%, we obtain the branching fraction of the radiative transition to be B(ψ(3686)→γηc(2S))=(5.2±0.3(stat)±0.5(syst)+1.9−1.4(extr))×10−4, where the third uncertainty is due to the quoted B(ηc(2S)→K¯Kπ).



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки