# EPS HEP 2013 Stockholm

17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

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

20 Jul 2013, 11:20
20m
F2 (KTH Campus)

### F2

#### KTH Campus

Talk presentation Top and Electroweak Physics

### Speaker

Roman Poeschl (Universite de Paris-Sud 11 (FR))

### Description

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.

### Primary author

Roman Poeschl (Universite de Paris-Sud 11 (FR))

### Presentation Materials

 eps2013.odp eps2013.pdf