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DOI: 10.5445/IR/1000089491
Veröffentlicht am 14.01.2019

Observation of e$^{+}$e$^{-}$ -> π$^{+}$π$^{-}$π$^{0}$χ$_{b1,2}$(1$\textit{P}$) and search for e$^{+}$e$^{-}$ -> ϕχ$_{b1,2}$(1$\textit{P}$) at $\sqrt{s}$ = 10.96$-$11.05 GeV

Belle Collaboration; Yin, J. H.; Yuan, C. Z.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bahinipati, S.; Bakich, A. M.; Bansal, V.; Behera, P.; Beleño, C.; Bhuyan, B.; Bilka, T.; Biswal, J.; Bobrov, A.; ... mehr

Abstract:
We report searches for the processes e$^{+}$e$^{-}$ → π$^{+}$π$^{-}$π$^{0}$χ$_{bj}$ and e$^{+}$e$^{-}$ → ϕχ$_{bj}$ (J=1, 2) based on data samples collected by the Belle experiment at the KEKB collider. We report the first observation of the process e$^{+}$e$^{-}$ → $^{+}$π$^{-}$π$^{0}$$_{non−ωχb1}$ and first evidence for e$^{+}$e$^{-}$ → ωχbJ in the vicinity of the Υ(11020) resonance, with center-of-mass energies from 10.96 to 11.05 GeV. The significances for $^{+}$π$^{-}$π$^{0}$$_{non−ωχb1}$ and ωχbJ are greater than 5.3σ and 4.0σ, respectively. We also investigate the energy dependence of the e$^{+}$e$^{-}$ →$^{+}$π$^{-}$π$^{0}$χbJ cross section, but we cannot determine whether the contributions are from the Υ(10860) and Υ(11020) resonances or nonresonant continuum processes. The signals for e$^{+}$e$^{-}$ → ϕ$_{χbj}$ are not significant, and the upper limits of the Born cross sections at the 90% confidence level are 0.7 and 1.0 pb for e$^{+}$e$^{-} → ϕχb1 and ϕχb2, respectively, for center-of-mass energies from 10.96 to 11.05 GeV.


Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2470-0010, 2470-0029
URN: urn:nbn:de:swb:90-894918
KITopen-ID: 1000089491
Erschienen in Physical review / D
Band 98
Heft 9
Seiten Art.-Nr.: 091102
Vorab online veröffentlicht am 15.11.2018
Nachgewiesen in Web of Science
Scopus
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