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Showing papers by "P. N. Ratoff published in 1984"

Evidence for a narrow massive state in the radiative decays of the upsilon

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C. W. Peck, W. J. Metzger, R. T. Van de Walle, D. Besset, P. N. Ratoff, F. H. Heimlich, H. Wegener, Hans J. Vogel, D. G. Aschman, G. Folger, T. Kloiber, B. Niczyporuk, F. Messing, A. M. Cartacci, Axel König, W. Maschmann, B. Lurz, A. Engler, M. Schmitz, W. S. Lockman, U. Volland, H. J. Trost, W. Walk, K. Wacker, Matteo Cavalli-Sforza, D. Antreasyan, M Schneider, W. Koch, B. Renger, J Yeager, Grzegorz Nowak, U. Strohbusch, A. Fridman, R. Nernst, K. Strauch, J. Tompkins, K. Königsmann, S. Keh, S. Cooper, A. Schwarz, D. Prindle, Tomasz Skwarnicki, G. Conforto, R W Krämer, Robert Hofstadter, R. Cabenda, I. C. Brock, Alan Litke, P. Zschorsch, B. Monteleoni, D. C. Coyne, S. Leffler, M. Scheer, J. Irion, J. Schotanus, I. Kirkbride, F. C. Porter, Z. Jakubowski, C. Rippich, Raymond Lee, S. Lowe, D. Gelphman, P. Lezoch, D. Sievers, Robert Clare, P. Schmitt, G.L. Godfrey, Elliott D. Bloom, David R. Williams, Daniel Robert Marlow, J. Gaiser, R. Lekebusch, J. K. Bienlein, B. Pollock, R. Cowan, K. Wachs, C. Newman-Holmes, P. G. Pelfer, H. Kilian 
01 Jul 1984
TL;DR: Niczyporuk et al. as mentioned in this paper presented evidence for a state, which they call <, with a mass M = (8322 f 8 f 24) MeV and a line width < 80 MeV using the Crystal Ball NaI(T1) detector at DORIS II.
Abstract: Evidence is presented for a state, which we call <, with a mass M = (8322 f 8 f 24) MeV and a line width < 80 MeV (90% confidence level) using the Crystal Ball NaI(T1) detector at DORIS II. Radiative transitions to this state are observed from about 100,000 Y(1S) decays in two independent sets of data: one in which < --* multiple hadrons, and one which is strongly biased towards < --) 2 low multiplicity jets. The branching ratio to this state from Y(lS) is on the order of 0.5% . Presented at the 12th SLAC Summer Institute on Particle Physics Stanford, California, July 22 August 3, 1984 * Work supported by the Department of Energy, contract DE-AC03-76SFOO515 t Permanent address: Institute of Nuclear Physics, Cracow, Poland. 0 Boguslaw B. Niczyporuk 1984

2 citations