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Searches for New Quarks and Leptons Produced in Z-Boson Decay

Abrams, G. S. and Barish, B. C. and Hawkes, C. M. and Kuhlen, M. and McKenna, J. A. and Milliken, B. D. and Peck, C. and Porter, F. C. and Soderstrom, E. and Stroynowski, R. and Weir, A. J. and Wicklund, E. and Wu, D. Y. and Weinstein, Alan J. (1989) Searches for New Quarks and Leptons Produced in Z-Boson Decay. Physical Review Letters, 63 (22). pp. 2447-2451. ISSN 0031-9007. doi:10.1103/PhysRevLett.63.2447.

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We have searched for events with new-particle topologies in 390 hadronic Z decays with the Mark II detector at the SLAC Linear Collider. We place 95%-confidence-level lower limits of 40.7 GeV/c^2 for the top-quark mass, 42.0 GeV/c^2 for the mass of a fourth-generation charge - 1/3 quark, and 41.3 GeV/c^2 for the mass of an unstable Dirac neutral lepton.

Item Type:Article
Related URLs:
URLURL TypeDescription
Porter, F. C.0000-0003-1948-8889
Weinstein, Alan J.0000-0002-0928-6784
Additional Information:© 1989 The American Physical Society. Received 13 October 1989; published in the issue dated 27 November 1989. We express our appreciation to the dedicated efforts of the staff of SLAC and collaborating universities who made the SLC and these results possible. This work was supported in part by Department of Energy Contracts No. DE-AC03-81ER40050 (California Institute of Technology), No. DE-AM03-76SF00010 (University of California, Santa Cruz), No. DE-AC02-86ER40253 (University of Colorado), No. DE-AC03-83ER40103 (University of Hawaii), No. DE-AC02-84ER40125 Ondiana University), No. DE-AC03-76SF00098 (LBL), No. DE-AC02-76ER01112 (University of Michigan), and No. DE-AC03-76SF00515 (SLAC), and by the National Science Foundation (Johns Hopkins University).
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC03-81-ER40050
Department of Energy (DOE)DE-AM03-76SF00010
Department of Energy (DOE)DE-AC02-86ER40253
Department of Energy (DOE)DE-AC03-83ER40103
Department of Energy (DOE)DE-AC02-84ER40125
Department of Energy (DOE)DE-AC03-76SF00098
Department of Energy (DOE)DE-AC02-76ER01112
Department of Energy (DOE)DE-AC03-76SF00515
Issue or Number:22
Classification Code:PACS: 13.38.+c, 12.15.Ff, 14.60.Gh, 14.80.Dq
Record Number:CaltechAUTHORS:20120510-105525610
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Official Citation:Searches for new quarks and leptons produced in Z-boson decay G. S. Abrams et al. pp. 2447-2451
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31410
Deposited By: Ruth Sustaita
Deposited On:10 May 2012 20:17
Last Modified:09 Nov 2021 19:52

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