Single-top production at LHC
The top quark is produced at LHC through electroweak processes in association with light quarks or W bosons. It takes the name single top to emphasize its difference with the top quark-antiquark pairs production processes. The main production mechanism, happening through W boson exchange in the t-channel, allows to probe the electroweak sector of top quark physics through precision measurements of observables like the top quark polarization and the helicity of the W boson produced in the top quark decays. Single-top processes provide independent routes to measure fundamental parameters of the standard model like the top quark mass and the CKM matrix element Vtb.
The CMS Napoli group is involved in all t-channel production measurements since the very first evidence of such process at the LHC obtained in 2011 through measurements of the angular properties of top-quark candidate decay products, up to the latest measurements in Run-II.
We have been involved in several properties and top quark mass measurements, as well as the search for the s-channel single-top.
References
- CMS TOP-16-003, submitted to PLB
- CMS TOP-15-004
- CMS TOP-15-001
- CMS TOP-13-009, published to JHEP
- CMS TOP-12-038, published to JHEP
- CMS TOP-11-021, published to JHEP
- CMS TOP-10-008, published to PRL
Theses
- Francesco Fienga, Study of single-top production in the t-channel with the CMS experiment at LHC at √s=8 TeV, 2013
- Mario Merola, Study of the t-channel single top quark production and decay through t → Wb → eνb at LHC with the CMS Experiment 2011
- Alberto Orso Maria Iorio, Measurement of single top t-channel production cross section through the t → Wb → μνb decay in 7 TeV proton-proton collisions with the Compact Muon Solenoid detector at the Large Hadron Collider, 2011
