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Radiative Decays of the Upsilon(1S) to a Pair of Charged Hadrons

S. B. Athar·CLEO Collaboration
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Abstract

Using data obtained with the CLEO~III detector, running at the Cornell Electron Storage Ring (CESR), we report on a new study of exclusive radiative Upsilon(1S) decays into the final states gamma pi^+ pi^-, gamma K^+ K^-, and gamma p pbar.. We present branching ratio measurements for the decay modes Upsilon(1S) to gamma f_2(1270), Upsilon(1S) to gamma f_2'(1525), and Upsilon(1S) to gamma K^+K^-; helicity production ratios for f_2(1270) and f_2'(1525); upper limits for the decay Upsilon(1S) to gamma f_J(2200), with f_J(2220) to pi^+ pi^-, K^+ K^-, p pbar; and an upper limit for the decay Upsilon(1S) to gamma X(1860), with X(1860) to gamma p pbar.

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S. B. Athar, CLEO Collaboration. 2005-10-05. Radiative Decays of the Upsilon(1S) to a Pair of Charged Hadrons. https://doi.org/10.1103/physrevd.73.032001

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