Search for invisible decays of the {upsilon}(1S) resonance

Journal Article · Thu Feb 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.031104· OSTI ID:21010961

Rubin, P ^[1]; Cawlfield, C; Eisenstein, B I; Karliner, I; Kim, D; Lowrey, N; Naik, P; Selen, M; White, E J; Wiss, J ^[2]; Mitchell, R E; Shepherd, M R ^[3]; Besson, D ^[4]; Pedlar, T K ^[5]; Cronin-Hennessy, D; Gao, K Y; Hietala, J; Kubota, Y; Klein, T; Lang, B W ^[6]

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1. George Mason University, Fairfax, Virginia 22030 (United States)
2. University of Illinois, Urbana-Champaign, Illinois 61801 (United States)
3. Indiana University, Bloomington, Indiana 47405 (United States)
4. University of Kansas, Lawrence, Kansas 66045 (United States)
5. Luther College, Decorah, Iowa 52101 (United States)
6. University of Minnesota, Minneapolis, Minnesota 55455 (United States)

We present a measurement of the branching fraction of invisible {upsilon}(1S) decays, using 1.2 fb{sup -1} of data collected at the {upsilon}(2S) resonance with the CLEO III detector at CESR. After subtracting expected backgrounds from events that pass selection criteria for invisible {upsilon}(1S) decay in {upsilon}(2S){yields}{pi}{sup +}{pi}{sup -}{upsilon}(1S), we deduce a 90% C.L. upper limit of B[{upsilon}(1S){yields}invisible]<0.39%.

• OSTI ID: 21010961
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CESR STORAGE RING
HADRONIC PARTICLE DECAY
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PIONS MINUS
PIONS PLUS
RESONANCE PARTICLES
UPSILON-10355 MESONS
UPSILON-9460 MESONS