# 4th ComHEP: Colombian Meeting on High Energy Physics (Barranquilla, Colombia)

2-6 December 2019
America/Bogota timezone

## U(1)' coupling constant at low energies from heterotic orbifolds

3 Dec 2019, 15:40
20m
Teatrino 1 (Centro Cultural, Universidad del Atlántico)

### Teatrino 1

#### Centro Cultural, Universidad del Atlántico

Universidad del Atlántico Carrera 30 No. 8-49 Puerto Colombia, Atlántico
Talk

### Speaker

Omar Pérez Figueroa (Instituto de Física, UNAM)

### Description

Extensions of the Standard Model include frequently an additional $\text{U}(1)$ gauge symmetry. Such scenarios are known as Z’ or dark photon models and are relevant to address issues such as the meta-stability of the Higgs vacuum, the nature of DM or the muon g-2 anomaly. In the context of $E_8\times E_8$ heterotic string compactifications, MSSM-like models with extra $\text{U}(1)$ can be found, so that Z’ models can be realized in the low energy limit. We study such string vacua, obtained from a $\mathbb{Z}_8$ toroidal orbifold compactification, and characterize the Z’ coupling at low energies under certain assumptions. We find Z' coupling values around 0.44-0.7 and argue that a sample model may have the required properties to stabilize the Higgs vacuum.

### Primary authors

Yessenia Olguín Trejo (Instituto de Física, UNAM) Omar Pérez Figueroa (Instituto de Física, UNAM) Ricardo Pérez Martínez (Instituto de Física, UNAM and Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Coahuila) Dr Saúl Ramos Sánchez (Instituto de Física, UNAM)