Publication: Observation of h(c) Radiative Decay h(c) -> gamma eta ' and Evidence for h(c) -> gamma eta
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Tapan, İlhan
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Amer Physical
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Abstract
A search for radiative decays of the P-wave spin singlet charmonium resonance h(c) is performed based on 4.48 x 10(8) psi' events collected with the BESIII detector operating at the BEPCII storage ring. Events of the reaction channels h(c) -> gamma eta' and gamma eta are observed with a statistical significance of 8.4 sigma and 4.0 sigma, respectively, for the first time. The branching fractions of h(c) -> gamma eta' and h(c) -> gamma eta' are measured to be B(h(c) -> gamma eta') = (1.52 +/- 0.27 +/- 0.29) x 10(-3) and B(h(c) -> gamma eta) = (4.7 +/- 1.5 +/- 1.4) x 10(-4), respectively, where the first errors are statistical and the second are systematic uncertainties.
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Çalışmada 426 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesı mensuplarının girişleri yapılmıştır.
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Keywords
Physics, Seismic waves, Branching fractions, Charmonium, P waves, Radiative decay, Reaction channels, Spin singlets, Statistical significance, Systematic uncertainties, Systematic errors
Citation
Ablikim, M. vd. (2016). "Observation of h(c) Radiative Decay h(c) -> gamma eta ' and Evidence for h(c) -> gamma eta". Physical Review Letters, 116(25).