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

Journal Article · Sun Apr 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.072001· OSTI ID:21020236

Besson, D ^[1]; Pedlar, T K ^[2]; 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 ^[3]; Dobbs, S; Metreveli, Z; Seth, K K; Tomaradze, A; Zweber, P ^[4]; Ernst, J ^[5]; Arms, K ^[6]; Severini, H ^[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)

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}.

• OSTI ID: 21020236
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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