Speaker
Glauber Carvalho Dorsch
(University of Sussex)
Description
The nature of the electroweak phase transition in two-Higgs-doublet models is revisited
in light of the recent LHC results. A scan over an extensive region of their parameter space is performed, showing that a strongly first-order phase transition favours a light neutral scalar with SM-like properties, together with a heavy pseudo-scalar and a mass hierarchy in the scalar sector. Altogether, the findings indicate that the exotic decay A^0 -> Z H^0 would be a ‘smoking gun’ signature of these scenarios at LHC. We analyse the LHC search prospects for this decay in the ℓℓbb and ℓℓW+W− final states, arguing that current data may be sensitive to this signature in the former channel as well as there being great potential for a discovery in either one at the very early stages of the 14 TeV run.
Primary authors
Glauber Carvalho Dorsch
(University of Sussex)
Jose M. No
(University of Sussex)
Ken Mimasu
(University of Sussex)
Stephan Huber
(University of Sussex)
