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Search for Leptoquarks and FCNC in $e^{+} e^{-}$ annihilations at $\sqrt{s}$=183 GeV (2006)

Abstract

A search for events with one jet and at most one isolated leptonused data taken at LEP-2 by the DELPHI detector.These data were accumulated at a center-of-mass energy of183 GeV and correspond to an integrated luminosity of47.7 pb$^{-1}$.Production of single scalar and vector leptoquarkswas searched for. Limits at 95\% confidence level werederived on the masses (ranging from $134~{\rm GeV/c^2}$ to $171~{\rm GeV/c^2}$ for electromagnetic type couplings) and couplings of the leptoquark states.A search for top-charm flavour changing neutral currents($e^+ e^- \rightarrow \bar t c$ or charge conjugate) used the semileptonic decay channel. A limit on the flavour changing cross-section vianeutral currents was set at 0.55pb (95\% confidence level).

Publication details

Download	http://hal.in2p3.fr/in2p3-00001163/en/
Publisher	HAL - CCSD
Repository	INRIA a CCSD electronic archive server based on P.A.O.L (France)
Keywords	Physics/High Energy Physics - Experiment
Type	peer-reviewed article
Relation	http://hal.inria.fr/docs/00/00/47/57/PDF/democrite-00001163.pdf