Электронный каталог

Статья

Ablikim, M.
Cross-Section Measurements of e*+e*-*>*fK*+K*- and e*+e*-*>*fK*0&sub(S)K*0&sub(S) at Center-of-Mass Energies Between 3.7730 GeV and 4.7008 GeV / 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.3. – P.032004. – URL: https://doi.org/10.1103/PhysRevD.108.032004. – Bibliogr.:50.

Based on 22.7 fb−1 of e+e− annihilation data collected at 33 different center-of-mass energies between 3.7730 and 4.7008 GeV with the BESIII detector at the BEPCII collider, Born cross sections of the two processes e+e−→ϕK+K− and e+e−→ϕK0SK0S are measured for the first time. No indication of resonant production through an intermediate vector state V is observed, and the upper limits on the product of the electronic width Γe+e− and the branching fraction Br(V→ϕK¯K) of the processes e+e−→V→ϕK+K− and e+e−→V→ϕK0SK0S at the 90% confidence level are obtained for a large parameter space in resonance masses and widths. For the current world average mass and width of the ψ(4230) of m=4.2187  GeV/c2 and Γ=44  MeV, we set upper limits on the ϕK+K− and ϕK0SK0S final states of 1.75 and 0.47 eV at the 90% confidence level, respectively.



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