1996/08/19 by Michael A. Doncheski, Michael A Doncheski, Stephen Godfrey · 2 citations
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1016/s0370-2693(96)01647-4
published as Phys.Lett. B393 (1997) 355-359 · Latex file uses revtex version 3, epsfig, and rotate, 5 postcript figures are attached. The full postcript version with embedded figures is also available at ftp://ftp.physics.carleton.ca/pub/theory/godfrey/ocip961.ps
arxiv created 1996/08/19 · openalex publication_date 1997/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the discovery potential for first generation leptoquarks at the LEP and LEP200 e+e- colliders. We consider single leptoquark production via resolved photon contributions which offers a much higher kinematic limit than the more commonly considered leptoquark pair production process. This process also has the advantage that it is independent of the leptoquark chirality, is almost insensitive to whether the leptoquark is scalar or vector, and only depends on the leptoquark charge. We estimate that from the nonobservation of energetic e-jet events, the limits at LEP for all types of leptoquarks are MLQ > 90~GeV. For the just completed √(s)=161~GeV run at LEP200 we estimate potential scalar leptoquark mass limits of MLQ > 130~GeV for QLQ=-2/3, -4/3 and MLQ > 148~GeV for QLQ=-1/3, -5/3 and for vector LQ's the limits are 140 and 154~GeV respectively. Ultimately, LEP200 should be able to achieve discovery limits for leptoquarks of ∼ 188~GeV for the √(s)=190~GeV runs. In all cases we assume electromagnetic strength coupling.