Constraining Light Bosons with Radiative ${\rm Y}(1S)$ Decays

Abstract

Light bosons can be found in large classes of theories beyond the Standard Model. These light bosons may not be ruled out by current experiments and, indeed, may even provide an explanation for some anomalous experimental results. The radiative decays of quarkonium ($c\bar{c},b\bar{b}$) states offer a promising opportunity to investigate such light bosons. Specifically, we investigate the reach that current CLEO data can have on models with light scalar and pseudoscalar bosons.

8 pages, 16 figures, RevTeX; v2: published version

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• Complete structure dependent analysis of the decay $P\to l^{+}{l}^{-}$