Speaker
Ms
Paola Ferrario
(IFIC-Valencia)
Description
Several models predict the existence of heavy colored resonances
decaying to top quarks in the TeV energy range that might be
discovered at the LHC. In some of those
models, moreover, a sizable charge asymmetry of top versus
antitop quarks might be generated. The detection of these
exotic resonances, however, requires selecting data samples
where the top and the antitop quarks are highly boosted, which is
experimentally very challenging. We assess that the measurement
of the top quark charge asymmetry at the LHC is very sensitive
to the existence of excited states of the gluon with axial-vector
couplings to quarks. We use a toy model with general flavour
independent couplings, and show that a signal can be detected
with relatively not too energetic top and antitop quarks.
We also compare the results with the asymmetry predicted by
QCD, and show that its highest statistical significance
is achieved with data samples of top-antitop quark pairs
of low invariant masses.
Author
Ms
Paola Ferrario
(IFIC-Valencia)
Co-author
Mr
Rodrigo Germán
(IFIC-Valencia)
