2023-08-042023-08-042017Ablikim, M. vd. (2017). ''Observation of the doubly radiative decay eta ' -> gamma gamma pi(0)''. Physical Review D, 96(1).2470-00102470-0029https://doi.org/10.1103/PhysRevD.96.012005https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.012005http://hdl.handle.net/11452/33358Çalışmada 429 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesi mensuplarının girişleri yapılmıştır.Based on a sample of 1.31 billion J/psi events collected with the BESIII detector, we report the study of the doubly radiative decay eta' -> gamma gamma pi(0) for the first time, where the eta' meson is produced via the J/psi -> gamma eta' decay. The branching fraction of eta' -> gamma gamma pi(0) inclusive decay is measured to be B(eta' -> gamma gamma pi(0))(Incl) = (3.20 +/- 0.07(stat) +/- 0.23(sys)) x 10(-3), while the branching fractions of the dominant process eta' -> gamma omega and the non-resonant component are determined to be B(eta' -> gamma omega) x B(omega -> gamma pi(0)) = (23.7 +/- 1.4(stat) +/- 1.8(sys)) x 10(-4) and B(eta' -> gamma gamma pi(0))(NR) = (6.16 +/- 0.64(stat) +/- 0.67(sys)) x 10(-4), respectively. In addition, the M-gamma gamma(2)-dependent partial widths of the inclusive decay are also presented.eninfo:eu-repo/semantics/openAccessAstronomy & astrophysicsPhysicsChiral erturbation theoryArticle0004065467000012-s2.0-85027237359961Astronomy & astrophysicsPhysics, particles & fieldsMesons; Deterioration; Kaons