Observation of e+e- →ηhc at center-of-mass energies from 4.085 to 4.600 GeV M. Ablikim, M. N. Achasov, S. Ahmed [et.al.]
Material type:
ArticleSubject(s): BESIII, детектор | BEPCII, коллайдерGenre/Form: статьи в журналах Online resources: Click here to access online
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Physical Review D Vol. 96, № 1. P. 012001-1-012001-13Abstract: We observe for the first time the process e+e−→ηhc with data collected by the BESIII experiment. Significant signals are observed at the center-of-mass energy s=4.226 GeV, and the Born cross section is measured to be (9.5−2.0+2.2±2.7) pb. Evidence for ηhc is observed at s=4.358 GeV with a Born cross section of (10.0−2.7+3.1±2.6) pb, and upper limits on the production cross section at other center-of-mass energies between 4.085 and 4.600 GeV are determined.
Библиогр.: 61 назв.
We observe for the first time the process e+e−→ηhc with data collected by the BESIII experiment. Significant signals are observed at the center-of-mass energy s=4.226 GeV, and the Born cross section is measured to be (9.5−2.0+2.2±2.7) pb. Evidence for ηhc is observed at s=4.358 GeV with a Born cross section of (10.0−2.7+3.1±2.6) pb, and upper limits on the production cross section at other center-of-mass energies between 4.085 and 4.600 GeV are determined.
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