We study bottomonium production in association with an eta meson in e+e-annihilations near the gamma (5S), at a centre-of-mass energy of sqrt(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 eta meson is reconstructed and the missing-mass spectrum of eta candidates is investigated. We observe the e+e--> eta Upsilon(J)(1D) process and find evidence for the e+e- -> eta Upsilon(2S) process, while no significant signals of Upsilon(1S), h(b)(1P), nor h(b)(2P) are found. Cross sections for the studied processes are reported.
Inclusive study of bottomonium production in association with an η meson in e+e- annihilations near Υ(5S)
Tenchini, F.;
2018-01-01
Abstract
We study bottomonium production in association with an eta meson in e+e-annihilations near the gamma (5S), at a centre-of-mass energy of sqrt(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 eta meson is reconstructed and the missing-mass spectrum of eta candidates is investigated. We observe the e+e--> eta Upsilon(J)(1D) process and find evidence for the e+e- -> eta Upsilon(2S) process, while no significant signals of Upsilon(1S), h(b)(1P), nor h(b)(2P) are found. Cross sections for the studied processes are reported.File in questo prodotto:
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