Search for Leptoquarks and FCNC in e+e− annihilations at S(1/2) = 183-GeV

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1999) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 446, n° 1, p. 62-74 (1999)

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Abstract
A search for events with one jet and at most one isolated lepton used data taken at LEP-2 by the DELPHI detector. These data were accumulated at a center-of-mass energy of 183 GeV and correspond to an integrated luminosity of 47.7 pb−1. Production of single scalar and vector leptoquarks was searched for. Limits at 95% confidence level were derived on the masses (ranging from View the MathML source to View the MathML source for electromagnetic type couplings) and couplings of the leptoquark states. A search for top-charm flavour changing neutral currents (View the MathML source or charge conjugate) used the semileptonic decay channel. A limit on the flavour changing cross-section via neutral currents was set at 0.55pb (95% confidence level).
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1999). Search for Leptoquarks and FCNC in e+e− annihilations at S(1/2) = 183-GeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 446(1), 62-74. https://doi.org/10.1016/S0370-2693(98)01525-1 (Original work published 1999)