Speaker
Lucio Cerrito
(ROMA2)
Description
The violation of the combined charge conjugation (C) and parity
transformation (P) of particles and antiparticles implies that the laws of
physics are not the same for matter and antimatter. Observations of CP violation are not
sufficient to explain the matter–antimatter asymmetry in the universe, and
it is believed that a source of new physics is required. The abundance of
top quarks at the Large Hadron Collider are usually exploited to explore top
properties or search for heavy resonances, however top decay products also
provide a unique window for measurements of CP violation in b- and c-quarks.
Utilising semileptonic b-decays, CP sensitive asymmetries may be built from
lepton-pairs in the l+jets channel. The first analysis to use this technique
is presented using data collected by the ATLAS detector.
