Observation of chi-b(1PJ,2PJ) decays to light hadrons

Abstract

Analyzing ${\rm Y}(nS)$ decays acquired with the CLEO detector operating at the CESR $e^{+}{e}^{-}$ collider, we measure for the first time the product branching fractions $\mathcal{B}[{\rm Y}(nS)\to \gamma {\chi }_b((n-1)P_J)]\times \mathcal{B}[{\chi }_b(n-1)P_J)\to X_i]$ for $n=2$ and 3, where $X_i$ denotes, for each $i$, one of the fourteen exclusive light-hadron final states for which we observe significant signals in both ${\chi }_b(1P_J)$ and ${\chi }_b(2P_J)$ decays. We also determine upper limits for the electric dipole (E1) transitions ${\rm Y}(3S)\to \gamma {\chi }_b(1P_J)$.

12 pages, 3 figures, submitted to Phys. Rev. D (Rapid Communications)

References in corpus (2)

• Photon transitions in Upsilon(2S) and Upsilon(3S)
• Comparison of Particle Production in Quark and Gluon Fragmentation at sqrt s ~ 10 GeV

Cited by in corpus (9)

• Heavy quarkonium: progress, puzzles, and opportunities
• Recent Results in Bottomonium
• Observation of eta_b(2S) in Upsilon(2S) -> gamma eta_b(2S), eta_b(2S) -> hadrons, and Confirmation of eta_b(1S)
• Study of radiative bottomonium transitions using converted photons
• Measurements of branching fractions for electromagnetic transitions involving the ${\chi }_{bJ}(1P)$ states
• Partial wave effects in the heavy quarkonium radiative electromagnetic decays
• Dominant spin-orbit effects in radiative decays {${\rm Y}(3S\to \gamma {\chi }_{bJ}(1P))$}}
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Exclusive decays of χ_{bJ} and η_b into two charmed mesons