2-6 December 2019
Centro Cultural, Universidad del Atlántico
America/Bogota timezone

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

3 Dec 2019, 15:40
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


Omar Pérez Figueroa (Instituto de Física, UNAM)


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)

Presentation Materials