Evidence for e+e−→γηc(1S) at center-of-mass energies between 4.01 and 4.60 GeV

The BESIII Collaboration

Результат исследования: Научные публикации в периодических изданияхстатья

7 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаанглийский
Номер статьи051101
Число страниц8
ЖурналPhysical Review D
Том96
Номер выпуска5
DOI
СостояниеОпубликовано - 1 сен 2017

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