Çetin, Serkant Ali2020-11-262020-11-262016-06-211079-71140031-9007https://hdl.handle.net/11411/2736https://doi.org/10.1103/PhysRevLett.116.251802A 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.eninfo:eu-repo/semantics/openAccessArticle2-s2.0-8497763181210.1103/PhysRevLett.116.25180227391715Q1WOS:000378209900007