Speaker
Kevin Finelli
(University of Sydney (AU))
Description
Measurements of single top-quark production in proton proton
collisions at 7 and 8 TeV are presented. In the leading order process,
a W boson is exchanged in the t-channel. The single top-quark and
anti-top total production cross sections, their ratio, as well as a
measurement of the inclusive production cross section is presented. In
addition, a measurement of the production cross section of a single
top quark in association with a W boson is presented. All measurements
are compared to state-of-the-art theoretical calculations and the CKM
matrix element |Vtb| is determined. In addition, the s-channel
production is explored and limits on exotic production in single top
quark processes are discussed. This includes the search for flavor
changing neutral currents and the search for additional W’ bosons or a
search for monotops.
Measurements of single top quark production are presented, performed using CMS data collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The cross sections for the electroweak production of single top quarks in the t-channel and in association with W-bosons is measured and the results are used to place constraints on the CKM matrix element Vtb. In the t-channel the ratio of top and anti-top production cross sections is determined and compared with predictions from different parton density distribution functions. Measurements of top quark properties in single top quark production are also presented. The results include the W-helicity in top quark decay and the searches for s-channel production and for anomalous couplings.
Primary author
Dick Greenwood Jr
(Louisiana Tech University (US))
