Observation of. Upsilon. (4 S ) decays into non- B B final states containing. psi. mesons

Journal Article · Mon May 07 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2226· OSTI ID:6718196

Alexander, J; Artuso, M; Bebek, C; Berkelman, K; Cassel, D G; Cheu, E; Coffman, D M; Crawford, G; DeWire, J W; Drell, P S; Ehrlich, R; Galik, R S; Gittelman, B; Gray, S W; Halling, A M; Hartill, D L; Heltsley, B K; Kandaswamy, J; Katayama, N; Kreinick, D L ; Lewis, J D; Mistry, N B; Mueller, J; Namjoshi, R; Nandi, S; Nordberg, E; O'Grady, C; Peterson, D; Pisharody, M; Riley, D; Sapper, M; Silverman, A; Stone, S; Worden, H; Worris, M; Sadoff, A J; Avery, P; Besson, D; Garren, L; Yelton, J; Bowcock, T; Kinoshita, K; Pipkin, F M; Procario, M; Wilson, R; Wolinski, J; Xiao, D; Ammar, R; Baringer, P; Coppage, D; Haas, P; Lam, H; Jawahery, A; Park, C H; Kubota, Y; Nelson, J K; Perticone, D; Poling, R; Fulton, R; Jensen, T; Johnson, D R; Kagan, H; Kass, R; Morrow, F; Whitmore, J; Wilson, P; Chen, W; Dominick, J; McIlwain, R L; Miller, D H; Ng, C R; Schaffner, S F; Shibata, E I; Yao, W; Sparks, K; Thorndike, E H; Wang, C

We report on the observation of {psi} mesons from {Upsilon}(4{ital S}) decays which are too energetic to come from {ital B} mesons. These events provide the first evidence for non-{ital B{bar B}} decays of the {Upsilon}(4{ital S}). The measured rate is {ital B}({Upsilon}(4{ital s}){r arrow}{psi}{ital X})=(0.22{plus minus}0.06{plus minus}0.04)% for {psi} momentum above 2 GeV/{ital c}.

• DOE Contract Number: AC02-83ER40105; FG05-86ER40272
• OSTI ID: 6718196
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANNIHILATION
B MESONS
BASIC INTERACTIONS
BOSONS
BOTTOMONIUM
CHARM PARTICLES
CHARMED MESONS
CHARMONIUM
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CYCLIC ACCELERATORS
D MESONS
DATA ANALYSIS
DECAY
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ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
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HADRONIC PARTICLE DECAY
HADRONS
INTERACTIONS
J PSI-3097 MESONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASS SPECTRA
MESONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE KINEMATICS
PIONS
PSEUDOSCALAR MESONS
QUARKONIUM
SPECTRA
SYNCHROTRONS
UPSILON-10575 MESONS
VECTOR MESONS