Электронный каталог

Статья

Ablikim, M.
Study of e*+e*- *> *W*-*W^-*+ at Center-of-Mass Energies from 3.49 to 3.67 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.107, No.5. – P.052003. – URL: https://doi.org/10.1103/PhysRevD.107.052003. – Bibliogr.:49.

Using data samples of e+e− collisions collected with the BESIII detector at eight center-of-mass energy points between 3.49 and 3.67 GeV, corresponding to an integrated luminosity of 670  pb−1, we present the upper limits of Born cross sections and the effective form factor for the process e+e−→Ω−¯Ω+. A fit to the cross sections using a perturbative QCD-derived energy-dependent function shows no significant threshold effect. The upper limit on the measured effective form factor is consistent with a theoretical prediction within the uncertainty of 1σ. These results provide new experimental information on the production mechanism of Ω.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки
Бюллетени = 40/023