Calculable mass hierarchies and a light dilation from gravity duals
by
Maurizio Piai
(Swansea University)
→
Europe/Madrid
IFAE Seminar room (IFAE)
IFAE Seminar room
IFAE
Description
Within gauge/gravity dualities, we provide an example of a strongly-coupled, multi-scale system that yields a parametrically light mass for one of the composite scalar particles: the dilaton. We calculate the scalar and tensor mass spectrum of the boundary theory defined by a special 8-scalar sigma-model in five dimensions, the background solutions of which include the 1-parameter family dual to the baryonic branch of the Klebanov-Strassler field theory. We briefly discuss the implications, in view of both the big and little hierarchy problems of the electro-weak theory.