July 31, 2018 to August 6, 2018
Maynooth University
Europe/Dublin timezone

Holographic Phase Transition in Soft Walls: Gravitational Waves and Collider Signatures

Aug 2, 2018, 4:20 PM
Hall D (Arts Bldg.)

Hall D

Arts Bldg.

Talk G: Strongly Coupled Theories Strongly Coupled Theories


Dr Eugenio Megias (University of Granada)


We study the electroweak phase transition within a 5-dim warped model
including a scalar potential with an exponential behavior, and strong
back-reaction over the metric, in the infrared. By means of a novel
treatment of the superpotential formalism, we explore parameter
regions that were previously inaccessible. We find that for large
values of the t’Hooft parameter the holographic phase transition
occurs, and it can force the Higgs to undergo a first order
electroweak phase transition, suitable for electroweak
baryogenesis. The model exhibits gravitational waves and colliders
signatures. It typically predicts a stochastic gravitational wave
background observable both at the Laser Interferometer Space Antenna
and at the Einstein Telescope. Moreover the radion tends to be heavy
enough such that it evades current constraints, but may show up in
future LHC runs. Some relatd references are [1,2,3,4,5]. This work is based on [6].

[1] W.D.Goldberger, M.B.Wise, PRL83 (1999) 4922-4925.
[2] L.Randall, G.Servant, JHEP 05 (2007) 054.
[3] G.Nardini, M.Quiros, A.Wulzer, JHEP09 (2007) 077.
[4] T.Konstandin, G.Nardini, M.Quiros, PRD82 (2010) 083513.
[5] C.Caprini et al. JCAP 1604 (2016) 001.
[6] E.Megias, G.Nardini, M.Quiros, in preparation (2018).

Primary authors

Dr Eugenio Megias (University of Granada) Mariano Quiros Carcelen (ICREA - Institucio catalana de recerca estudis avancats (ES)) Germano Nardini (Universitaet Bern)

Presentation materials