Evidence for New-Flavor Production at the ϒ ( 4 S )

An enhancement has been observed in the inclusive cross section for direct single electrons produced in e/sup +/e/sup -/ annihilation at the UPSILON(4S). This is interpreted as evidence for a new weakly decaying particle, the B meson. A branching ratio for B..-->..Xe..nu.. of (13 +- 3( +- 3))% is...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1981-01, Vol.46 (2), p.84-87
Hauptverfasser:	Bebek, C., Haggerty, J., Izen, J. M., Longuemare, C., Loomis, W. A., Pipkin, F. M., Rohlf, J., Tanenbaum, W., Wilson, Richard, Sadoff, A. J., Bridges, D. L., Chadwick, K., Ganci, P., Kagan, H., Kass, R., Lobkowicz, F., Melissinos, A., Olsen, S. L., Poling, R., Rosenfeld, C., Rucinski, G., Thorndike, E. H., Warren, G., Bechis, D., Mueller, J. J., Potter, D., Sannes, F., Skubic, P., Stone, R., Brody, A., Chen, A., Goldberg, M., Horwitz, N., Kandaswamy, J., Kooy, H., Lariccia, P., Moneti, G. C., Alam, M. S., Csorna, S. E., Panvini, R. S., Poucher, J. S., Andrews, D., Berkelman, K., Cabenda, R., Cassel, D. G., DeWire, J. W., Ehrlich, R., Ferguson, T., Gentile, T., Gilchriese, M. G. D., Gittleman, B., Hartill, D. L., Herrup, D., Herzlinger, M., Kreinick, D. L., Mistry, N. B., Nordberg, E., Perchonok, R., Plunkett, R., Shinsky, K. A., Siemann, R. H., Silverman, A., Stein, P. C., Stone, S., Talman, R., Thonemann, H. G., Weber, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	645102 > High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties ANNIHILATION BASIC INTERACTIONS BOSONS BOUND STATE BRANCHING RATIO CHERENKOV COUNTERS COMPOSITE MODELS CROSS SECTIONS DATA DECAY ELECTROMAGNETIC INTERACTIONS ELECTRON-POSITRON INTERACTIONS ELECTRONS ELEMENTARY PARTICLES EXPERIMENTAL DATA FERMIONS FLAVOR MODEL HADRONS INCLUSIVE INTERACTIONS INFORMATION INTERACTIONS LEPTON-LEPTON INTERACTIONS LEPTONS MATHEMATICAL MODELS MEASURING INSTRUMENTS MECHANICS MESON RESONANCES MESONS NUMERICAL DATA PARTICLE DECAY PARTICLE INTERACTIONS PARTICLE MODELS PARTICLE PRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POSTULATED PARTICLES QUARK MODEL QUARKS RADIATION DETECTORS RESONANCE PARTICLES 645101 > High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties STATISTICAL MECHANICS STORAGE RINGS UPSILON RESONANCES
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Beschreibung
Zusammenfassung:	An enhancement has been observed in the inclusive cross section for direct single electrons produced in e/sup +/e/sup -/ annihilation at the UPSILON(4S). This is interpreted as evidence for a new weakly decaying particle, the B meson. A branching ratio for B..-->..Xe..nu.. of (13 +- 3( +- 3))% is inferred, where the first set of errors is statistical and the estimated systematic error is enclosed in parentheses.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.46.84