Branching Fractions for ψ(2S)-to-J/ψ Transitions

17 June 2005

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 94 (23) , 232002
https://doi.org/10.1103/physrevlett.94.232002

Abstract

We describe new measurements of the inclusive and exclusive branching fractions for

ψ (2 S)

transitions to

J / ψ

using

e^{+} e^{-}

collision data collected with the CLEO detector operating at CESR. All branching fractions and ratios of branching fractions reported here represent either the most precise measurements to date or the first direct measurements. Indirectly and in combination with other CLEO measurements, we determine

B (χ_{c J} \to γ J / ψ)

and

B [ψ (2 S) \to light hadrons]

Keywords

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