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Title: Radiative decays of the {upsilon}(1S) to {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}

Abstract

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

Authors:
 [1];  [2]; ; ; ; ; ; ; ; ; ;  [3]; ; ; ; ;  [4];  [5];  [6];  [7]
  1. University of Kansas, Lawrence, Kansas 66045 (United States)
  2. Luther College, Decorah, Iowa 52101 (United States)
  3. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
  4. Northwestern University, Evanston, Illinois 60208 (United States)
  5. State University of New York at Albany, Albany, New York 12222 (United States)
  6. Ohio State University, Columbus, Ohio 43210 (United States)
  7. University of Oklahoma, Norman, Oklahoma 73019 (United States) (and others)
Publication Date:
OSTI Identifier:
21020236
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.072001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; BRANCHING RATIO; CESR STORAGE RING; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; ETA MESONS; F0-1590 MESONS; F0-1730 MESONS; GEV RANGE; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PHOTONS; POSITRONS; RADIATIVE DECAY; RESONANCE PARTICLES; UPSILON-9460 MESONS

Citation Formats

Besson, D., Pedlar, T. K., Cronin-Hennessy, D., Gao, K. Y., Gong, D. T., Hietala, J., Kubota, Y., Klein, T., Lang, B. W., Poling, R., Scott, A. W., Smith, A., Dobbs, S., Metreveli, Z., Seth, K. K., Tomaradze, A., Zweber, P., Ernst, J., Arms, K., and Severini, H. Radiative decays of the {upsilon}(1S) to {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.072001.
Besson, D., Pedlar, T. K., Cronin-Hennessy, D., Gao, K. Y., Gong, D. T., Hietala, J., Kubota, Y., Klein, T., Lang, B. W., Poling, R., Scott, A. W., Smith, A., Dobbs, S., Metreveli, Z., Seth, K. K., Tomaradze, A., Zweber, P., Ernst, J., Arms, K., & Severini, H. Radiative decays of the {upsilon}(1S) to {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}. United States. doi:10.1103/PHYSREVD.75.072001.
Besson, D., Pedlar, T. K., Cronin-Hennessy, D., Gao, K. Y., Gong, D. T., Hietala, J., Kubota, Y., Klein, T., Lang, B. W., Poling, R., Scott, A. W., Smith, A., Dobbs, S., Metreveli, Z., Seth, K. K., Tomaradze, A., Zweber, P., Ernst, J., Arms, K., and Severini, H. Sun . "Radiative decays of the {upsilon}(1S) to {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}". United States. doi:10.1103/PHYSREVD.75.072001.
@article{osti_21020236,
title = {Radiative decays of the {upsilon}(1S) to {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}},
author = {Besson, D. and Pedlar, T. K. and Cronin-Hennessy, D. and Gao, K. Y. and Gong, D. T. and Hietala, J. and Kubota, Y. and Klein, T. and Lang, B. W. and Poling, R. and Scott, A. W. and Smith, A. and Dobbs, S. and Metreveli, Z. and Seth, K. K. and Tomaradze, A. and Zweber, P. and Ernst, J. and Arms, K. and Severini, H.},
abstractNote = {We report on a study of exclusive radiative decays of the {upsilon}(1S) resonance into the final states {gamma}{pi}{sup 0}{pi}{sup 0}, {gamma}{eta}{eta} and {gamma}{pi}{sup 0}{eta}, using 1.13 fb{sup -1} of e{sup +}e{sup -} annihilation data collected at {radical}(s)=9.46 GeV with the CLEO III detector operating at the Cornell Electron Storage Ring. In the channel {gamma}{pi}{sup 0}{pi}{sup 0}, we measure the branching ratio for the decay mode {upsilon}(1S){yields}{gamma}f{sub 2}(1270) to be (10.5{+-}1.6(stat){sub -1.8}{sup +1.9}(syst))x10{sup -5}. We place upper limits on the product branching ratios for the isoscalar resonances f{sub 0}(1500) and f{sub 0}(1710) for the {pi}{sup 0}{pi}{sup 0} and {eta}{eta} decay channels. We also set an upper limit on the {upsilon}(1S) radiative decay into {pi}{sup 0}{eta}.},
doi = {10.1103/PHYSREVD.75.072001},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}