Search for eta_b(1S) in Inclusive Radiative Decays of the Upsilon(3S)

2002/07/24 by A.H. Mahmood, A. H. Mahmood, Mahmood, A. H. +2
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0207057

11 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

arxiv created 2002/07/24 · arxiv updated 2009/11/30

Abstract

We have searched for the bottomonium eta_b(1S) via the hindered magnetic dipole (M1) photon transition Upsilon(3S) -> gamma eta_b(1S). No evidence for such a transition is found in the data sample of 4.7 x 10⁶ Upsilon(3S)'s collected with the CLEO-III detector. We set upper limits on the branching ratio from 9.30 to 9.43 GeV/c² of eta_b(1S) masses. These upper limits rule out many previously published phenomenological estimates of the rate for this transition.

Related

• Improved Measurement of the Branching Fraction and Engery Spectrum of eta' from Upsilon(1S) Decays
• Observation of h_b(1P)->eta_b(1S)gamma
• Observation of the bottomonium ground state, eta_b, at BaBar
• Decays of the Upsilon(1S) into a Photon and Two Charged Hadrons
• Searching for new physics in Upsilon decays