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Nernst, R.; Antreasyan, D.; Aschman, D.; Besset, D.; Bienlein, J.K.; Bloom, E.D.; Brock, I.; Cabenda, R.; Cartacci, A.; Cavalli-Sforza, M.; Clare, R.; Conforto, G.; Cooper, S.; Cowan, R.; Coyne, D.; Judicibus, D. de; Edwards, C.; Engler, A.; Folger, G.; Fridman, A.; Gaiser, J.; Gelphman, D.; Godfrey, G.; Heimlich, F.H.; Hofstadter, R.; Irion, J.; Jakubowski, Z.; Keh, S.; Kilian, H.; Kirkbride, I.; Kloiber, T.; Koch, W.; Koenig, A.C.; Koenigsmann, K.; Kraemer, R.W.; Lee, R.; Leffler, S.; Lekebusch, R.; Lezoch, P.; Litke, A.M.; Lockman, W.; Lowe, S.; Lurz, B.; Marlow, D.; Maschmann, W.; Matsui, T.; Messing, F.; Metzger, W.J.; Monteleoni, B.; Newman-Holmes, C.; Niczyporuk, B.; Nowak, G.; Peck, C.; Pelfer, P.G.; Pollock, B.; Porter, F.C.; Prindle, D.; Ratoff, P.; Renger, B.; Rippich, C.; Scheer, M.; Schmitt, P.; Schmitz, M.; Schotanus, J.; Schwarz, A.; Sievers, D.; Skwarnicki, T.; Strauch, K.; Strohbusch, U.; Tompkins, J.; Trost, H.J.; Walle, R.T. van de; Volland, U.; Wacker, K.; Walk, W.; Wegener, H.; Williams, D.; Zschorsch, P.
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.); Crystal Ball Collaboration1985
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.); Crystal Ball Collaboration1985
AbstractAbstract
[en] The inclusive photon spectrum in hadronic decays of the Y(2S) is measured with the Crystal Ball detector at DORIS II. Four well separated photon lines, which are consistent with the decay hypothesis Y(2S) -> γ 3Psub(2,1,0) and 3Psub(2,1) -> γ Y(1S), are observed. The energies of the lines from the primary transitions are Esub(γ1) = (110.4+-0.8+-2.2) MeV, Esub(γ2) = (130.6+-0.8+-2.4) MeV and Esub(γ3) = (163.8+-1.6+-2.7) MeV; the branching fractions are (5.8+-0.7+-1.0)%, (6.5+-0.7+-1.2)% and (3.6+-0.8+-0.9)% respectively. The secondary transitions center at (Esub(γ)) approx.= 430 MeV with a combined branching fraction of (3.6+-0.7+-0.5)%. (orig.)
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Feb 1985; 13 p; SLAC-PUB--3571; CONTRACT DE-AC03-81ER40050; DE-AC02-76ER03066; DE-AC02-76ER03064; DE-AC02-76ER03072; DE-AC03-76SF00515; DE-AS03-76SF00326; PHY75-22980; PHY84-07870; PHY82-08761
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Report
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Numerical Data
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BOSONS, DATA, DECAY, ELEMENTARY PARTICLES, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, GEV RANGE, HADRONS, INFORMATION, INTERACTIONS, LEPTON-LEPTON INTERACTIONS, MASSLESS PARTICLES, MESON RESONANCES, MESONS, MULTIPOLE TRANSITIONS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE INTERACTIONS, RESONANCE PARTICLES, SPECTRA, UPSILON RESONANCES, VECTOR MESONS
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