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Regular version of the site

Article

Inclusive study of bottomonium production in association with an η meson in e+e- annihilations near Υ(5 S) : Belle Collaboration

The European Physical Journal C - Particles and Fields. 2018. Vol. 78. No. 8. P. 1-10.
Аушев Т. А., Mizuk R., Pakhlov P., Pakhlova G., Углов Т. В.

We study bottomonium production in association with an η meson in e+e- annihilations near the Υ(5 S) , at a centre-of-mass energy of s=10.866 GeV. The results are based on the 121.4 fb- 1 data sample collected by the Belle experiment at the asymmetric-energy KEKB collider. Only the η meson is reconstructed and the missing-mass spectrum of η candidates is investigated. We observe the e+e-→ ηΥJ(1 D) process and find evidence for the e+e-→ ηΥ(2 S) process, while no significant signals of Υ(1 S) , hb(1 P) , nor hb(2 P) are found. Cross sections for the studied processes are reported. © 2018, The Author(s).