Search for the X (2370) and observation of eta(c) -> eta eta eta ' in J/psi -> gamma eta eta eta '
Göster/ Aç
Erişim
info:eu-repo/semantics/openAccessAttribution-NoDerivs 3.0 United Stateshttp://creativecommons.org/licenses/by-nd/3.0/us/Tarih
2021Üst veri
Tüm öğe kaydını gösterKünye
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., ... & Kuessner, M. (2021). Search for the X (2370) and observation of η c→ η η η′ in J/ψ→ γ η η η′. Physical Review D, 103(1), 012009.Özet
Using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector, we perform a study of J/psi -> gamma eta eta eta' to search for the X(2370) and eta(c) in the eta eta eta' invariant mass distribution. No significant signal for the X(2370) is observed, and we set an upper limit for the product branching fraction of B(J/psi -> gamma X(2370) . B(X(2370) -> eta eta eta') < 9.2 x 10(-6) at the 90% confidence level. A clear eta(c) signal is observed for the first time, yielding a product branching fraction of B(J/psi -> gamma eta(c)).B(eta c -> eta eta eta') = (4.86 +/- 0.62(stat) +/- 0.45(sys)) x 10(-5).
Kaynak
Physical Review DCilt
103Sayı
1Koleksiyonlar
Aşağıdaki lisans dosyası bu öğe ile ilişkilidir: