Evidence for e(+)e(-) -> gamma eta(c)(1S) at center-of-mass energies between 4.01 and 4.60 GeV

2023-08-082023-08-082017-09-01Ablikim, M. vd. (2017). ''Evidence for e(+)e(-) -> gamma eta(c)(1S) at center-of-mass energies between 4.01 and 4.60 GeV''. Physical Review D, 96(5).2470-00102470-0029https://doi.org/10.1103/PhysRevD.96.051101https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.051101http://hdl.handle.net/11452/33412Çalışmada 445 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesi mensuplarının girişleri yapılmıştır.We present first evidence for the process e(+)e(-) -> gamma eta(c)(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.eninfo:eu-repo/semantics/openAccessAstronomy & astrophysicsPhysicsEvidence for e(+)e(-) -> gamma eta(c)(1S) at center-of-mass energies between 4.01 and 4.60 GeVArticle0004094339000012-s2.0-85031117225965Astronomy & astrophysicsPhysics, particles & fieldsCharmonium; Deterioration; Mesons