A light scalar from walking solutions in gauge-string duality
by
Daniel Elander(Swansea University, UK)
→
Europe/Stockholm
CoPS group room (A5: 1041)
CoPS group room (A5: 1041)
Description
Recently, a class of solutions to the Type IIB system of Nc
D5-branes wrapped on S2 were found that exhibit walking behaviour, i.e. a
suitably defined gauge coupling stays approximately constant over a large
intermediate energy regime. These models provide interesting laboratories
in which dynamical questions about the strongly coupled properties of
walking theories can be addressed. One such question is whether the
spontaneous breaking of scale invariance leads to the existence of a light
scalar in the spectrum, the dilaton. In this talk, I will review results
from an analytical and numerical study, which indicates the presence of
such a light state, the mass of which is suppressed by the length of the
walking region.
