2015/05/22 by Mohammad Sohail Amjad, S. Bilokin, Amjad, M. S. +22
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1505.06020
openalex publication_date 2015/05/22 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
Top quark production in the process e+e- → tt at a future linear electron positron collider with polarised beams is a powerful tool to determine indirectly the scale of new physics. The presented study, based on a detailed simulation of the ILD detector concept, assumes a centre-of-mass energy of √(s)=500 GeV and a luminosity of L=500 \rm 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 and the cross sections and the forward-backward asymmetries are determined. Based on these results, the vector, axial vector and tensorial CP conserving couplings are extracted separately for the photon and the Z0 component. With the expected precision, a large number of models in which the top quark acts as a messenger to new physics can be distinguished with many standard deviations. This will dramatically improve expectations from e.g. the LHC for electro-weak couplings of the top quark.