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A precise determination of top quark electroweak couplings at the ILC operating at 500 GeV

R. Poeschl 1
1 ILC
LAL - Laboratoire de l'Accélérateur Linéaire
Abstract : Top quark production in the process e+e- -> ttbar at a future linear electron positron collider with polarised beams is a powerful tool to determine the scale of new physics. The presented study assumes a centre-of-mass energy of 500 GeV and an integrated luminosity of 500 fb-1 equally shared between the incoming beam polarisations of (Pe+, Pe-) = (+/-0.8,-/+0.3). Events are selected in which the top pair decays semi-leptonically. The study comprises the cross sections, the forward-backward asymmetry and the slope of the helicity angle asymmetry. The vector, axial vector and tensorial CP conserving couplings are separately determined for the photon and the Z^0 component. The sensitivity to new physics would be dramatically improved with respect to that expected from the LHC for electroweak couplings.
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Submitted on : Monday, December 16, 2013 - 2:48:09 PM
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R. Poeschl. A precise determination of top quark electroweak couplings at the ILC operating at 500 GeV. 2013 European Physical Society Conference on High Energy Physics (EPSHEP 2013), Jul 2013, Stockholm, Sweden. pp.244. ⟨in2p3-00848641⟩

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