The EWK-produced top quark: single even at 13 TeV!
On Tuesday, 15 September, at the TOP2015 international workshop in Ischia, Italy , the CMS experiment presented the first cross section measurement of the electroweakly-produced top quark at 13 TeV c.o.m energy.
"I think everyone must have been completely and thoroughly impressed. This must be by far the most complex thing that CMS has done so far on 13 TeV", said Andreas Meyer, one of the leaders of top quark analysis group in CMS.
At hadron colliders, only one top quark is produced through electroweak interactions with a Standard Model rate of at least ~4 times smaller than the pair production via strong couplings. Single top quark processes provide a unique testing ground for the study of the tWb vertex structure, as well as the measurement of the CKM matrix element Vtb. With a 3.5 sigma of observed significance, the CMS measurement is still dominated by statistical uncertainties of the first delivered data sample with an integrated luminosity of 42 pb-1. The CP3 members, Georgios Krintiras, Matthias Komm and Abideh (Nadjieh) Jafari were involved in this measurement.
Reference url: http://cds.cern.ch/record/2052187?ln=en