TY  - SER
AU  - Achasov,M.N.
AU  - Ahmed,S.
AU  - Chelkov,G.A.
AU  - Ablikim,M.
TI  - Evidence for e+e-→γηc (1S) at center-of-mass energies between 4.01 and 4.60 GeV
KW  - BESIII, детектор
KW  - BEPCII, коллайдер
KW  - столкновение частиц
KW  - статьи в журналах
N1  - Библиогр.: 30 назв
N2  - We present first evidence for the process e+e−→γηc(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve ηc(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section σpeak(e+e−→γηc(1S))=2.11±0.49(stat.)±0.36(syst.)  pb with a statistical significance of 4.2σ
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000645264
ER  -