arXiv subjects

Kelly Beernaert

Publications and source records attributed to Kelly Beernaert.

3 recordsLinked to original sources

arXiv2016

Top-Quark Properties at the LHC

A review of recent measurements of top-quark properties is presented. Inclusive and differential top-quark pair charge asymmetry measurements using the full Run I dataset are found to be in agreement with the standard model (SM) predictions. Results of spin correlation in top-quark pairs are presented and interpreted in terms of the SM predicted values and new physics models. Limits are set on flavour-changing neutral currents (FCNC), in particular with a Higgs boson in the final state.

hep-ex↗

arXiv2015

Top Quark Properties at the LHC

The presented results on top quark properties include measurements of the top quark pair charge asymmetry, the top quark polarization in pair production and single top production, the W helicity in top quark decays. Results of spin correlation in top quark pairs are presented and interpreted in terms of the Standard Model (SM) predicted values. The cross section of tt events produced in association with a W, Z boson or a photon is also presented. The results are compared with predictions from the standard model as well as new physics models.

hep-ex↗

arXiv2014

Measurements of $t\bar{t}$ spin correlations in CMS

We present an overview of the measurements of $t\bar{t}$ spin correlations in the CMS Collaboration. We present two analyses both in the dilepton channel using proton-proton collisions at $\sqrt{s}\, =\, 7$ TeV based on an integrated luminosity of 5.0 fb$^{-1}$. The spin correlations and polarization are measured using angular asymmetries. The results are consistent with unpolarized top quarks and Standard Model spin correlation. The second analysis sets a limit on the real part of the top-quark chromo-magnetic dipole moment of $-0.043\, <\, Re({\hatμ}_{t})\, <\, 0.117$ at $95\,%$ confidence level through the measured azimuthal angle difference between the two charged leptons from $t\bar{t}$ production.

hep-ex↗