Speaker
Peter Galler
(Humboldt-Universität zu Berlin)
Description
As heaviest elementary particle, the top quark represents an ideal
laboratory to search for physics beyond the SM. In this talk we study
an extended Higgs sector as a viable SM extension. In particular, we
investigate the impact of the type-II two-Higgs-doublet model with two
neutral Higgs bosons with masses larger than twice the top quark mass
on top-quark pair production. More specifically,
we calculate for top-quark pair production the resonant
contributions and the contributions from the interference with the SM
background (QCD and electro-weak) at next-to-leading order in the
strong coupling constant. Using representative CP-conserving as well as
CP-violating parameter scenarios phenomenological results will be
given for different observables including spin dependent
ones. Furthermore a comparison with experimental results is presented.
Author
Peter Galler
(Humboldt-Universität zu Berlin)
