First measurements of hadronic decays of the Z boson

Creators: Abrams, G. S.; Adolphsen, C. E.; Aleksan, R.; Alexander, J. P.; Averill, D.; Ballam, J.; Barish, B. C.; Barklow, T.; Barnett, B. A.; Bartelt, J.; Bethke, S.; Blockus, D.; de Boer, W.; Bonvicini, G.; Boyarski, A.; Brabson, B.; Breakstone, A.; Brom, J. M.; Bulos, F.; Burchat, P. R.; Burke, D. L.; Cence, R. J.; Chapman, J.; Chmeissani, M.; Cords, D.; Coupal, D. P.; Dauncey, P.; DeStaebler, H. C.; Dorfan, D. E.; Dorfan, J. M.; Drell, P. S.; Drewer, D. C.; Elia, R.; Fay, J.; Feldman, G. J.; Fernandes, D.; Field, R. C.; Ford, W. T.; Fordham, C.; Frey, R.; Fujino, D.; Gan, K. K.; Gero, E.; Gidal, G.; Glanzman, T.; Goldhaber, G.; Gomez Cadenas, J. J.; Gratta, G.; Grindhammer, G.; Grosse-Wiesmann, P.; Hanson, G.; Harr, R.; Harral, B.; Harrison, F. A.; Hawkes, C. M.; Hayes, K.; Hearty, C.; Herrup, D.; Heusch, C. A.; Hildreth, M. D.; Himel, T.; Hinshaw, D. A.; Holmgren, S.-O.; Hong, S. J.; Hutchinson, D.; Hylen, J.; Innes, W. R.; Jacobsen, R. G.; Jaffre, M.; Jaros, J. A.; Jung, C. K.; Kadyk, J. A.; Karlen, D.; Kent, J.; King, M.; Klein, S. R.; Koetke, D. S.; Komamiya, S.; Koska, W.; Kowalski, L. A.; Kozanecki, W.; Kral, J. F.; Kuhlen, M.; Labarga, L.; Lankford, A. J.; Larsen, R. R.; Le Diberder, F.; Levi, M. E.; Litke, A. M.; Lüth, V.; Lynch, G. R.; McKenna, J. A.; Matthews, J. A. J.; Mattison, T.; Milliken, B. D.; Moffeit, K. C.; Munger, C. T.; Murray, W. N.; Nash, J.; Nitz, D.; Ogren, H.; Ong, R. A.; O'Shaughnessy, K. F.; Parker, S. I.; Peck, C.; Perl, M. L.; Perrier, F.; Petersen, A.; Petradza, M.; Pitthan, R.; Porter, F. C.; Rankin, P.; Richman, J. D.; Riles, K.; Rouse, F. R.; Rust, D. R.; Sadrozinski, H. F. W.; Schaad, M. W.; Schalk, T. L.; Schumm, B. A.; Schwarz, A. S.; Seiden, A.; Smith, J. G.; Snyder, A.; Soderstrom, E.; Stoker, D. P.; Stroynowski, R.; Swartz, M.; Thun, R.; Trilling, G. H.; Van Kooten, R.; Voruganti, P.; Wagner, S. R.; Watson, S.; Weber, P.; Weigend, A.; Weir, A. J.; Wicklund, E.; Wolf, R. C.; Wood, D. R.; Woods, M.; Wormser, G.; Wright, R.; Wu, D. Y.; Yurko, M.; Zaccardelli, C.; von Zanthier, C.; Weinstein, Alan J.

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Abstract

We have observed hadronic final states produced in the decays of Z bosons. In order to study the parton structure of these events, we compare the distributions in sphericity, thurst, aplanarity, and number of jets to the predictions of several QCD-based models and to data from lower energies. The data and models agree within the present statistical precision.

Additional Information

© 1989 The American Physical Society. Received 31 July 1989. We are indebted to the SLAC staff and to the contributing universities whose monumental efforts culminated in the successful operation of the SLC which produced the events for this publication. This work was supported in part by Department of Energy Contracts No. DEAC03-81ER40050 (California Institute of Technology), No. DE-AM03-76SF00010 (University of California, Santa Cruz), No. DE-AC02-86ER40253 (University of Colorado), No. DEAC03-83ER40103 (University of Hawaii), No. DE-AC02-84ER40125 (Indiana University), No. DE-AC03-76SF00098 (LBL), No. DE-AC02-84ER40125 (University of Michigan), and No. DEAC03-76SF00515 (SLAC), and by the National Science Foundation (Johns Hopkins University).

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