Title

First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0

Document Type

Article

Publication Date

1-1-1999

Abstract

We report on a study of exclusive radiative decays of the ϒ(1S) resonance collected with the CLEO II detector operating at the Cornell Electron Storage Ring. We present the first observation of the radiative decays ?(1S)→γπ #x03C0; and ϒ(1S)→ γ #x03C0; #x03C0; . For the dipion mass regime m > 1.0 GeV we obtain B(ϒ(1S)→ γ#x03C0; #x03C0; )=(6.3±1.2±1.3)×10 and B(ϒ(1S)→ γ#x03C0; #x03C0; )=(1.7±0.6±0.3)×10 . © 2000 The American Physical Society. + - 0 0 + - -5 0 0 -5 #x03C0;#x03C0;

Publication Name

Physical Review Letters

Volume Number

82

First Page

286

Last Page

290

Issue Number

2

DOI

10.1103/PhysRevLett.82.286

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