Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV
Abstract
The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (𝑑���̂ t) and chromomagnetic (𝜇���̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable 𝐴���(1)FB is used to approximate the asymmetry. Candidate tt⎯⎯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for tt⎯⎯ final states. The values found for the parameters are 𝐴���(1)FB=0.048+0.095−0.087(stat)+0.020−0.029(syst),𝜇���̂ t=−0.024+0.013−0.009(stat)+0.016−0.011(syst), and a limit is placed on the magnitude of ∣∣𝑑���̂ t∣∣< 0.03 at 95% confidence level. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000424363Publication status
publishedExternal links
Journal / series
Journal of High Energy PhysicsVolume
Pages / Article No.
Publisher
SpringerSubject
Hadron-Hadron scattering (experiments); Top physicsOrganisational unit
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
09720 - de Cosa, Annapaola / de Cosa, Annapaola
More
Show all metadata