Speaker
Tom Neep
(University of Manchester (GB))
Description
The top quark is unique among the known quarks in that it decays before it has an
opportunity to form hadronic bound states. This makes measurements of its properties
particularly interesting as one can access directly the properties of a bare quark.
Measurements of the charge asymmetry in topquark
pair events are presented. The
measurements use both the 7 and 8 TeV ATLAS datasets and probe models of physics beyond the Standard Model. A measurement of the correlation between the direction of
the spins of topquark
pairs is also presented. The measurement agrees with the Standard
Model and is used to set limits on the production of the supersymmetric partner of the top
quark. In addition, a novel measurement of colour flow in topquark
pair events is
presented. The measurement uses the jets originating from the Wboson
and
demonstrates the ability of the colour flow observable to distinguish between colour octet
and colour singlet final states.
Author
Judith Katzy
(DESY, HAMBURG)
