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Measurement of upper limits for $Υ \to γ + R$ decays

J. L. Rosner¹, N. E. Adam², J. P. Alexander², D. G. Cassel², J. E. Duboscq², R. Ehrlich², L. Fields², R. S. Galik², L. Gibbons² et al. (CLEO Collaboration)

L. Gibbons², R. Gray², S. W. Gray², D. L. Hartill², B. K. Heltsley², D. Hertz², C. D. Jones², J. Kandaswamy², D. L. Kreinick², V. E. Kuznetsov², H. Mahlke-Krüger², P. U. E. Onyisi², J. R. Patterson², D. Peterson², J. Pivarski², D. Riley², A. Ryd², A. J. Sadoff², H. Schwarthoff², X. Shi², S. Stroiney², W. M. Sun², T. Wilksen², M. Weinberger², S. B. Athar³, R. Patel³, V. Potlia³, J. Yelton³, P. Rubin⁴, C. Cawlfield⁵, B. I. Eisenstein⁵, I. Karliner⁵, D. Kim⁵, N. Lowrey⁵, P. Naik⁵, M. Selen⁵, E. J. White⁵, J. Wiss⁵, R. E. Mitchell⁶, M. R. Shepherd⁶, D. Besson⁷, S. Henderson^7,*, T. K. Pedlar⁸, D. Cronin-Hennessy⁹, K. Y. Gao⁹, J. Hietala⁹, Y. Kubota⁹, T. Klein⁹, B. W. Lang⁹, R. Poling⁹, A. W. Scott⁹, A. Smith⁹, P. Zweber⁹, S. Dobbs¹⁰, Z. Metreveli¹⁰, K. K. Seth¹⁰, A. Tomaradze¹⁰, J. Ernst¹¹, K. M. Ecklund¹², H. Severini¹³, W. Love¹⁴, V. Savinov¹⁴, O. Aquines¹⁵, Z. Li¹⁵, A. Lopez¹⁵, S. Mehrabyan¹⁵, H. Mendez¹⁵, J. Ramirez¹⁵, G. S. Huang¹⁶, D. H. Miller¹⁶, V. Pavlunin¹⁶, B. Sanghi¹⁶, I. P. J. Shipsey¹⁶, B. Xin¹⁶, G. S. Adams¹⁷, M. Anderson¹⁷, J. P. Cummings¹⁷, I. Danko¹⁷, D. Hu¹⁷, B. Moziak¹⁷, J. Napolitano¹⁷, Q. He¹⁸, J. Insler¹⁸, H. Muramatsu¹⁸, C. S. Park¹⁸, E. H. Thorndike¹⁸, F. Yang¹⁸, T. E. Coan¹⁹, Y. S. Gao¹⁹, M. Artuso²⁰, S. Blusk²⁰, J. Butt²⁰, J. Li²⁰, N. Menaa²⁰, G. C. Moneti²⁰, R. Mountain²⁰, S. Nisar²⁰, K. Randrianarivony²⁰, R. Sia²⁰, T. Skwarnicki²⁰, S. Stone²⁰, J. C. Wang²⁰, K. Zhang²⁰, G. Bonvicini²¹, D. Cinabro²¹, M. Dubrovin²¹, A. Lincoln²¹, D. M. Asner²², K. W. Edwards²², R. A. Briere²³, T. Ferguson²³, G. Tatishvili²³, H. Vogel²³, and M. E. Watkins²³ (CLEO Collaboration)

¹Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
²Cornell University, Ithaca, New York 14853, USA
³University of Florida, Gainesville, Florida 32611, USA
⁴George Mason University, Fairfax, Virginia 22030, USA
⁵University of Illinois, Urbana-Champaign, Illinois 61801, USA
⁶Indiana University, Bloomington, Indiana 47405, USA
⁷University of Kansas, Lawrence, Kansas 66045, USA
⁸Luther College, Decorah, Iowa 52101, USA
⁹University of Minnesota, Minneapolis, Minnesota 55455, USA
¹⁰Northwestern University, Evanston, Illinois 60208, USA
¹¹State University of New York at Albany, Albany, New York 12222, USA
¹²State University of New York at Buffalo, Buffalo, New York 14260, USA
¹³University of Oklahoma, Norman, Oklahoma 73019, USA
¹⁴University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
¹⁵University of Puerto Rico, Mayaguez 00681, Puerto Rico
¹⁶Purdue University, West Lafayette, Indiana 47907, USA
¹⁷Rensselaer Polytechnic Institute, Troy, New York 12180, USA
¹⁸University of Rochester, Rochester, New York 14627, USA
¹⁹Southern Methodist University, Dallas, Texas 75275, USA
²⁰Syracuse University, Syracuse, New York 13244, USA
²¹Wayne State University, Detroit, Michigan 48202, USA
²²Carleton University, Ottawa, Ontario K1S 5B6, Canada
²³Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA

^*Current address: Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

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Phys. Rev. D 76, 117102 – Published 7 December, 2007

DOI: https://doi.org/10.1103/PhysRevD.76.117102

Abstract

We report on a study of exclusive radiative decays $Υ (n S) \to γ + R$ ( $n = 1$ , 2, 3), with $R$ a narrow resonant hadronic state decaying into four or more charged particles (plus possible neutrals). Using data collected from the CLEO III detector at the Cornell Electron Storage Ring, we present upper limits of order $10^{- 4}$ for such bottomonium two-body decays as a function of the mass $M_{R}$ recoiling opposite the photon.

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References (11)

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Physical Review D

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Measurement of upper limits for $Υ \to γ + R$ decays

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Measurement of upper limits for Υ→γ+R decays

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References (11)

Measurement of upper limits for $Υ \to γ + R$ decays