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

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}{ita...

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Veröffentlicht in:	Physical review letters 1990-05, Vol.64:19
Hauptverfasser:	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
Format:	Artikel
Sprache:	eng
Schlagworte:	ACCELERATORS ANNIHILATION B MESONS BASIC INTERACTIONS BOSONS BOTTOMONIUM CHARM PARTICLES CHARMED MESONS CHARMONIUM CORNELL 10-GEV SYNCHROTRON CYCLIC ACCELERATORS D MESONS DATA ANALYSIS DECAY ELECTROMAGNETIC INTERACTIONS ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES FERMIONS HADRONIC PARTICLE DECAY HADRONS INTERACTIONS J PSI-3097 MESONS LEPTON-LEPTON INTERACTIONS LEPTONS MASS SPECTRA MESONS PAIR PRODUCTION PARTICLE DECAY PARTICLE INTERACTIONS PARTICLE KINEMATICS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS PSEUDOSCALAR MESONS QUARKONIUM SPECTRA SYNCHROTRONS UPSILON-10575 MESONS VECTOR MESONS 645103 > High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
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Beschreibung
Zusammenfassung:	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}.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.64.2226