2024-01-192024-01-192015-10-14Ablikim, M. vd. (2015). ''Observation of η′ → ωe+e-''. Physical review d, 92(5).2470-00102470-0029https://doi.org/10.1103/PhysRevD.92.051101https://journals.aps.org/prd/abstract/10.1103/PhysRevD.92.051101https://hdl.handle.net/11452/39182Çalışmada 402 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesi mensuplarının girişleri yapılmıştır.Based on a sample of eta' mesons produced in the radiative decay J/psi -> gamma eta' in 1.31 x 10(9) J/psi events collected with the BESIII detector, the decay eta' -> omega e(+)e(-) is observed for the first time, with a statistical significance of 8 sigma. The branching fraction is measured to be B(eta' -> omega e(+)e(-)) = (1.97 +/- 0.34(stat) +/- 0.17(syst)) x 10(-4), which is in agreement with theoretical predictions. The branching fraction of eta' -> omega gamma is also measured to be (2.55 +/- 0.03(stat) +/- 0.16(syst)) x 10(-2), which is the most precise measurement to date, and the relative branching fraction B(eta' -> omega e(+)e(-))/B(eta' -> omega gamma) is determined to be (7.71 +/- 1.34(stat) +/- 0.54(syst)) x 10(-3).eninfo:eu-repo/semantics/openAccessArticle0003611193000012-s2.0-84979838233925Pubmed numarasıAstronomy & astrophysicsPhysics, particles & fieldsMesons; Deterioration; Kaons