Abstract
Evidence for the possible production, and rapid decay into e-italic/sup +/e/sup -/ pairs, of a new light particle in heavy-ion collisions motivates the reexamination of searches for light particles in upsilon decays. We have searched for the decay UPSILON(1S-italic)..--> gamma..+a-italic, where a-italic subsequently decays into an e-italic/sup +/e/sup -/ pair in the detector. We observe no evidence for this decay, and obtain an upper limit for the branching ratio. We also show that our limit excludes the possibility of short-lived axions within the original axion model.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.