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Published in:

Physical Review D 75,7 (2007)


We report on a study of exclusive radiative decays of the Y(1S) resonance into the final states gamma pi(0)pi(0), gamma eta eta and gamma pi(0)eta, using 1.13 fb(-1) of e(+)e(-) annihilation data collected at root s=9.46 GeV with the CLEO III detector operating at the Cornell Electron Storage Ring. In the channel gamma pi(0)pi(0), we measure the branching ratio for the decay mode Y(1S)->gamma f(2)(1270) to be (10.5 +/- 1.6(stat)(-1.8)(+1.9)(syst))x10(-5). We place upper limits on the product branching ratios for the isoscalar resonances f(0)(1500) and f(0)(1710) for the pi(0)pi(0) and eta eta decay channels. We also set an upper limit on the Y(1S) radiative decay into pi(0)eta.


Astronomy & Astrophysics;; Physics, Particles & Fields

Date of this Version

January 2007



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