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Glasser, R.G.; Sechi-Zorn, B.; Skard, J.A.J.; Wagner, S.; Zorn, G.T.
High energy accelerator and colliding beam user group. Progress report, March 1, 1984-February 28, 19851984
High energy accelerator and colliding beam user group. Progress report, March 1, 1984-February 28, 19851984
AbstractAbstract
[en] JADE and the other PETRA experiments have recently completed a scan to the highest available e+e- center-of-mass energies (46.8 GeV) as part of the search for toponium. There was no evidence for production of a standard charged 2/3 top quark, and an upper limit was derived for the leptonic width times hadronic branching ratio of such a resonance (GAMMA/sub ee/B/sub h/ < 1.9 keV at the 95% C.L.). Mass limits were also derived for the production of composite scalar bosons. Other important results from the JADE collaboration include a new (preliminary) measurement of the B lifetime (tau/sub B/ = 1.8 +/- 0.5 +/- 0.3 psec), and measurements of the b and c quark electroweak charge asymmetry. Finally, a measurement has been made of the two photon radiative width of the eta meson using the JADE detector operating at PETRA. The reaction studied was e+e- → e+e- eta (eta → γγ). For an e+e- luminosity of 14.65 pb-1, the event sample of eta's after background subtraction was 220.8 +/- 14.8 +/- 16.8 events
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Maryland Univ., College Park (USA). Dept. of Physics and Astronomy; p. 19-28; Oct 1984; p. 19-28; Available from NTIS, PC A06/MF A01; 1 as DE85008093
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Report
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BASIC INTERACTIONS, BEAUTY PARTICLES, BOSONS, DATA, DECAY, ELEMENTARY PARTICLES, ENERGY RANGE, FIELD THEORIES, GEV RANGE, GRAND UNIFIED THEORY, HADRONS, INFORMATION, INTERACTIONS, LEPTON-LEPTON INTERACTIONS, MASSLESS PARTICLES, MATHEMATICAL MODELS, MESONS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PROPERTIES, POSTULATED PARTICLES, PSEUDOSCALAR MESONS, QUANTUM FIELD THEORY, STORAGE RINGS, UNIFIED GAUGE MODELS, WEAK INTERACTIONS, WEAK PARTICLE DECAY
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