# ICHEP2018 SEOUL

Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

## Phenomenological consequences of Higgs inflation in the NMSSM at the electroweak scale

Jul 6, 2018, 4:45 PM
15m
103 (COEX, Seoul)

### 103

#### COEX, Seoul

Parallel Beyond the Standard Model

### Speaker

Dr Sebastian Paßehr (LPTHE)

### Description

It has been shown that the Next-to-Minimal Supersymmetric Standard Model (NMSSM) is a valid theory to describe inflation by Higgs bosons. In this model, the inflaton is a linear combination of the Higgs doublets while the Higgs singlet stabilizes the Higgs potential during inflation. The inflaton has a non-minimal coupling to gravity which appears in the low-energy effective Superpotential. Different from the $\mathbb{Z}_{3}$-invariant NMSSM an additional bilinear $\mu$ parameter is introduced which changes the phenomenology at the electroweak scale.

We investigate the impact of this inflation-inspired model on low-energy physics with the focus set on vacuum stability and Higgs phenomenology. We explore the extended parameter space and point out differences compared to the standard $\mathbb{Z}_{3}$-invariant NMSSM due to the additional $\mu$ term. Thereby, we take into account various experimental constraints.

### Co-authors

Dr Wolfgang G. Hollik (DESY) Dr Stefan Liebler (ITP, KIT) Prof. Gudrid Moortgat-Pick (Universität Hamburg) Prof. Georg Ralf Weiglein (DESY)