Электронный каталог

Статья

Ablikim, M.
Measurement of e*+e*-*>*f*p*+*p*- Cross Sections at Center-of-Mass Energies from 2.00 to 3.08 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.032011. – URL: https://doi.org/10.1103/PhysRevD.108.032011. – Bibliogr.:61.

Using data corresponding to an integrated luminosity of 651  pb−1 accumulated at 22 center-of-mass energies from 2.00 to 3.08 GeV by the BESIII experiment, the process e+e−→ϕπ+π− is studied. The cross sections for e+e−→ϕπ+π− are consistent with previous results, but with improved precision. To measure the mass and width of the structure observed in the cross section line shape, a combine fit is performed after enhancing the contribution from ϕf0(980). The fit reveals a structure with the mass of M=2178±20±5  MeV/c2 and the width of Γ=140±36±16  MeV, where the first uncertainties are statistical and the second ones are systematic.



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