Study of e⁺e⁻ → Υ(1S, 2S)η and e⁺e⁻ → Υ(1S)η′ at √s = 10.866 GeV with the Belle detector
Belle Collaboration; Kovalenko, E.; Garmash, A.; Krokovny, P.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Behera, P.; Bennett, J.; Bessner, M.; Bilka, T.; Biswal, J.; Bobrov, A.; Bondar, A.;
Abstract:
We report the first observation of the processes e+e−→Υ(1S,2S)η at √s=10.866 GeV, with significance exceeding 10σ for both processes. The measured Born cross sections are σ(e+e−→Υ(2S)η)=2.07±0.21±0.19 pb, and σ(e+e−→Υ(1S)η)=0.42±0.08±0.04 pb. We also set the upper limit on the cross section of the process e+e−→Υ(1S)η′ to be σ(e+e−→Υ(1S)η′)<0.037 pb at 90% C.L. The results are obtained with the data sample collected with the Belle detector at the KEKB asymmetric-energy e+e− collider in the energy range from 10.63 to 11.02 GeV.
| Zugehörige Institution(en) am KIT | Institut für Experimentelle Teilchenphysik (ETP) |
| Publikationstyp | Zeitschriftenaufsatz |
| Publikationsjahr | 2021 |
| Sprache | Englisch |
| Identifikator | ISSN: 2470-0010, 2470-0029 KITopen-ID: 1000141313 |
| Erschienen in | Physical review / D |
| Verlag | American Physical Society (APS) |
| Band | 104 |
| Heft | 11 |
| Seiten | Art.-Nr.: 112006 |
| Bemerkung zur Veröffentlichung | Gefördert durch SCOAP3 |
| Vorab online veröffentlicht am | 15.12.2021 |
| Nachgewiesen in | Dimensions Web of Science arXiv Scopus |