Orateur
Dr
Akin Wingerter
(LPSC)
Description
We revisit four generations within the context of supersymmetry. We
compute the perturbativity limits for the fourth generation Yukawa
couplings and show that if the masses of the fourth generation lie
within reasonable limits of their present experimental lower bounds,
it is possible to have perturbativity only up to scales around 1000
TeV. Such low scales are ideally suited to incorporate gauge mediated
supersymmetry breaking, where the mediation scale can be as low as
10-20 TeV. The minimal messenger model, however, is highly
constrained. While lack of electroweak symmetry breaking rules out a large part of the parameter space,
a small region exists, where the fourth generation stau is
tachyonic. General gauge mediation with its broader set of boundary
conditions is better suited to accommodate the fourth generation.
Auteurs principaux
Dr
Akin Wingerter
(LPSC)
Prof.
Rohini Godbole
(IISc Bangalore, India)
Prof.
Sudhir Vempati
(IISc Bangalore, India)
