Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series APC-TH
Subjects hep-th
Date Tuesday 2 October 2018
Time 14:00
Institute APC
Seminar Room 412 B - Rothko
Speaker's Last Name Dudas
Speaker's First Name Emilian
Speaker's Email Address
Speaker's Institution CPHT - Ecole Polytechnique
Title Hidden symmetries and Goldstone bosons from higher dimensions?
Abstract Free massless scalars have a shift symmetry. This is usually broken by interactions, such that quantum corrections induce a quadratically divergent mass term. In the Standard Model this leads to the hierarchy problem, the question why the Higgs mass is so much smaller than the Planck mass. We present an example where a large scalar mass term is avoided by coupling the scalar to an infinite tower of massive states, obtained from a six-dimensional theory compactified on a torus with magnetic flux. We show that the shift symmetry of the scalar is preserved in the effective four-dimensional theory despite the presence of gauge and Yukawa interaction terms.
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