TY  - SER
AU  - Ablikim,M.
AU  - Ai,X.C.
AU  - Chelkov,G.A.
AU  - Achasov,M.N.
ED  - Томский государственный университет
TI  - Study of e+e- → ωχcJ  at center of mass energies from 4.21 to 4.42 GeV
KW  - BESIII, детектор
KW  - BEPCII, коллайдер
KW  - электроны
KW  - статьи в журналах
N2  - Based on data samples collected with the BESIII detector at the BEPCII collider at nine center of mass energies from 4.21 to 4.42 GeV, we search for the production of e+e−→ωχcJ (J=0, 1, 2). The process e+e−→ωχc0 is observed for the first time, and the Born cross sections at s√=4.23 and 4.26 GeV are measured to be (55.4±6.0±5.9) and (23.7±5.3±3.5)  pb, respectively, where the first uncertainties are statistical and the second are systematic. The ωχc0 signals at the other seven energies and the e+e−→ωχc1 and ωχc2 signals are not significant, and the upper limits on the cross sections are determined. By examining the ωχc0 cross section as a function of center of mass energy, we find that it is inconsistent with the line shape of the Y(4260) observed in e+e−→π+π−J/ψ. Assuming the ωχc0 signals come from a single resonance, we extract the mass and width of the resonance to be (4230±8±6)  MeV/c2 and (38±12±2)  MeV, respectively, and the statistical significance is more than 9σ
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000531928
ER  -