Measurement of Top Quark Properties in Single Top Quark Production at CMS

Abstract

Single top-quark t-channel production is exploited for studies of top quark properties. The analyses include the measurement of the CKM matrix element, $|V_{tb}|$, search for anomalous couplings of the top quark using a Bayesian neural network analysis, measurement of single top-quark polarization which directly confirms the V-A nature of the $tWb$ production vertex, and the measurement of W-helicity fractions in the phase space sampled by a selection optimized for t-channel single top-quark production, orthogonal to the $t\overline{t}$ final states used in traditional measurements of these properties. All measurements are found to be consistent with the standard model predictions.

arXiv comment6 pages, 13 figures, To appear in the proceedings of ICHEP2014: 37th International Conference on High Energy Physics, 2-9 July 2014, Valencia, Spain

References in corpus (1)

• Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at sqrt(s) = 8 TeV