APS » Phys. Rev. D » Volume 75 » Issue 7

D. Besson,¹ T. K. Pedlar,² D. Cronin-Hennessy,³ K. Y. Gao,³ D. T. Gong,³ J. Hietala,³ Y. Kubota,³ T. Klein,³ B. W. Lang,³ R. Poling,³ A. W. Scott,³ A. Smith,³ S. Dobbs,⁴ Z. Metreveli,⁴ K. K. Seth,⁴ A. Tomaradze,⁴ P. Zweber,⁴ J. Ernst,⁵ K. Arms,⁶ H. Severini,⁷ S. A. Dytman,⁸ W. Love,⁸ S. Mehrabyan,⁸ J. A. Mueller,⁸ V. Savinov,⁸ Z. Li,⁹ A. Lopez,⁹ H. Mendez,⁹ J. Ramirez,⁹ G. S. Huang,¹⁰ D. H. Miller,¹⁰ V. Pavlunin,¹⁰ B. Sanghi,¹⁰ I. P. J. Shipsey,¹⁰ G. S. Adams,¹¹ M. Anderson,¹¹ J. P. Cummings,¹¹ I. Danko,¹¹ J. Napolitano,¹¹ Q. He,¹² H. Muramatsu,¹² C. S. Park,¹² E. H. Thorndike,¹² T. E. Coan,¹³ Y. S. Gao,¹³ F. Liu,¹³ M. Artuso,¹⁴ C. Boulahouache,¹⁴ S. Blusk,¹⁴ J. Butt,¹⁴ J. Li,¹⁴ N. Menaa,¹⁴ R. Mountain,¹⁴ S. Nisar,¹⁴ K. Randrianarivony,¹⁴ R. Redjimi,¹⁴ R. Sia,¹⁴ T. Skwarnicki,¹⁴ S. Stone,¹⁴ J. C. Wang,¹⁴ K. Zhang,¹⁴ S. E. Csorna,¹⁵ G. Bonvicini,¹⁶ D. Cinabro,¹⁶ M. Dubrovin,¹⁶ A. Lincoln,¹⁶ R. A. Briere,¹⁷ G. P. Chen,¹⁷ J. Chen,¹⁷ T. Ferguson,¹⁷ G. Tatishvili,¹⁷ H. Vogel,¹⁷ M. E. Watkins,¹⁷ J. L. Rosner,¹⁸ N. E. Adam,¹⁹ J. P. Alexander,¹⁹ K. Berkelman,¹⁹ D. G. Cassel,¹⁹ J. E. Duboscq,¹⁹ K. M. Ecklund,¹⁹ R. Ehrlich,¹⁹ L. Fields,¹⁹ R. S. Galik,¹⁹ L. Gibbons,¹⁹ R. Gray,¹⁹ S. W. Gray,¹⁹ D. L. Hartill,¹⁹ B. K. Heltsley,¹⁹ D. Hertz,¹⁹ C. D. Jones,¹⁹ J. Kandaswamy,¹⁹ D. L. Kreinick,¹⁹ V. E. Kuznetsov,¹⁹ H. Mahlke-Krüger,¹⁹ T. O. Meyer,¹⁹ P. U. E. Onyisi,¹⁹ J. R. Patterson,¹⁹ D. Peterson,¹⁹ E. A. Phillips,¹⁹ J. Pivarski,¹⁹ D. Riley,¹⁹ A. Ryd,¹⁹ A. J. Sadoff,¹⁹ H. Schwarthoff,¹⁹ X. Shi,¹⁹ S. Stroiney,¹⁹ W. M. Sun,¹⁹ T. Wilksen,¹⁹ M. Weinberger,¹⁹ S. B. Athar,²⁰ P. Avery,²⁰ L. Breva-Newell,²⁰ R. Patel,²⁰ V. Potlia,²⁰ H. Stoeck,²⁰ J. Yelton,²⁰ P. Rubin,²¹ C. Cawlfield,²² B. I. Eisenstein,²² I. Karliner,²² D. Kim,²² N. Lowrey,²² P. Naik,²² C. Sedlack,²² M. Selen,²² E. J. White,²² J. Wiss,²² M. R. Shepherd,²³ D. M. Asner,²⁴ and K. W. Edwards²⁴

(CLEO Collaboration)

¹University of Kansas, Lawrence, Kansas 66045, USA
²Luther College, Decorah, Iowa 52101, USA
³University of Minnesota, Minneapolis, Minnesota 55455, USA
⁴Northwestern University, Evanston, Illinois 60208, USA
⁵State University of New York at Albany, Albany, New York 12222, USA
⁶Ohio State University, Columbus, Ohio 43210, USA
⁷University of Oklahoma, Norman, Oklahoma 73019, USA
⁸University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
⁹University of Puerto Rico, Mayaguez, Puerto Rico 00681
¹⁰Purdue University, West Lafayette, Indiana 47907, USA
¹¹Rensselaer Polytechnic Institute, Troy, New York 12180, USA
¹²University of Rochester, Rochester, New York 14627, USA
¹³Southern Methodist University, Dallas, Texas 75275, USA
¹⁴Syracuse University, Syracuse, New York 13244, USA
¹⁵Vanderbilt University, Nashville, Tennessee 37235, USA
¹⁶Wayne State University, Detroit, Michigan 48202, USA
¹⁷Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
¹⁸Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
¹⁹Cornell University, Ithaca, New York 14853, USA
²⁰University of Florida, Gainesville, Florida 32611, USA
²¹George Mason University, Fairfax, Virginia 22030, USA
²²University of Illinois, Urbana-Champaign, Illinois 61801, USA
²³Indiana University, Bloomington, Indiana 47405, USA
²⁴Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Canada

We report on a study of exclusive radiative decays of the Upsilon(1S) resonance into the final states gammapi⁰pi⁰, gammaetaeta and gammapi⁰eta, using 1.13 fb^-1 of e⁺e^- annihilation data collected at sqrt(s)=9.46 GeV with the CLEO III detector operating at the Cornell Electron Storage Ring. In the channel gammapi⁰pi⁰, we measure the branching ratio for the decay mode Upsilon(1S)-->gammaf₂(1270) to be (10.5±1.6(stat)_-1.8^+1.9(syst))×10^-5. We place upper limits on the product branching ratios for the isoscalar resonances f₀(1500) and f₀(1710) for the pi⁰pi⁰ and etaeta decay channels. We also set an upper limit on the Upsilon(1S) radiative decay into pi⁰eta.

©2007 The American Physical Society

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