# YTF 20

15-16 December 2020
Centre for Particle Theory, Durham
Europe/London timezone

## Avoided Deconfinement in Randall-Sundrum Models

16 Dec 2020, 14:00
30m
Teams (Centre for Particle Theory, Durham)

### Teams

#### Centre for Particle Theory, Durham

IPPP & Dept. Mathematical Sciences Durham University South Road Durham DH1 3LE

### Speaker

Michael Nee (Oxford University)

### Description

In this talk I will discuss first order phase transitions in Randall-Sundrum models which are dual to (de)confinement phase transitions in large-$N$ gauge theories. The transition rate is suppressed by a factor $\exp(-N^2)$, and does not complete for $N \gg 1$, leading to an eternally inflating phase. The constraint on $N$ to avoid this fate is strong enough that the RS effective field theory is only marginally under control. We present a mechanism where the IR brane remains stabilised at very high temperature, so that the theory stays in the confined phase at arbitrarily high energies. This mechanism of avoided deconfinement is similar to Weinberg's symmetry non-restoration mechanism. Avoided deconfinement allows for a viable cosmology for parametrically large-$N$ theories. Early universe phenomena such as WIMP freeze-out, axion abundance, baryogenesis and phase transitions are qualitatively modified in the model, leading to new possibilities for phenomenological applications.

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### Primary authors

Michael Nee (Oxford University) Dr Prateek Agrawal (Oxford University)

### Presentation Materials

 Avoided Deconfinement - Durham YTF20.pdf Michael-Nee.mp4