Study of Two-Photon Transitions in CLEO-III $Υ(3S)$ Data

Simple item page
dc.creatorCinabro, D.
dc.creatorCollaboration, CLEO
dc.date2002-07-24
dc.date2002-08-29
dc.date.accessioned2026-07-07T03:35:25Z
dc.date.available2026-07-07T03:35:25Z
dc.descriptionWe have studied two-photon transitions from Upsilon(3S) decays recorded by the CLEO-III detector in exclusive events with two photons and either two electrons or two muons. We obtain precision measurements of the chi_b(2P_J) masses for J=2 and J=1. The transition rates for all three spin states of the 2P triplet are measured with improved precision which leads to a better determination of their hadronic width ratios. We also observe rare transitions via the chi_b(1P) states. The measured rates for these transitions allow a determination of <1P|r|3S>, the E1 matrix element, which is more sensitive to the structure of the bb states than the <2P|r|3S> matrix element which dominates the radiative decays of the Upsilon(3S) state. We also present first upper limits on the branching ratios for Upsilon(3S)-> pi0 Upsilon(2S), Upsilon(3S) -> pi0 Upsilon(1S) and a new limit for the branching ratio for Upsilon(3S) -> eta Upsilon(1S).
dc.description15 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, ICHEP02
dc.identifierhttps://arxiv.org/abs/hep-ex/0207062
dc.identifierhttp://arxiv.org/abs/hep-ex/0207062
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/37339
dc.subjectHigh Energy Physics - Experiment
dc.titleStudy of Two-Photon Transitions in CLEO-III $Υ(3S)$ Data
dc.typetext

Files

Collections

arXiv