6533b7d1fe1ef96bd125c47e
RESEARCH PRODUCT
From Type II string theory towards BSM/dark sector physics
Gabriele Honeckersubject
Quantum chromodynamicsPhysicsHeterotic string theoryHigh Energy Physics - TheoryNuclear and High Energy Physics010308 nuclear & particles physicsType II string theoryPhysics beyond the Standard ModelFOS: Physical sciencesAstronomy and AstrophysicsString theory01 natural sciencesString (physics)Atomic and Molecular Physics and OpticsModuliTheoretical physicsHigh Energy Physics - PhenomenologyHigh Energy Physics::TheoryHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - Theory (hep-th)0103 physical sciences010306 general physicsEffective actiondescription
Four-dimensional compactifications of string theory provide a controlled set of possible gauge representations accounting for BSM particles and dark sector components. In this review, constraints from perturbative Type II string compactifications in the geometric regime are discussed in detail and then compared to results from heterotic string compactifications and non-perturbative/non-geometric corners. As a prominent example, an open string realization of the QCD axion is presented. The status of deriving the associated low-energy effective action in four dimensions is discussed and open avenues of major phenomenological importance are highlighted. As examples, a mechanism of closed string moduli stabilization by D-brane backreaction as well as one-loop threshold corrections to the gauge couplings and balancing a low string scale $M_{\text{string}}$ with unisotropic compact dimensions are discussed together with implications on potential future new physics observations. For illustrative purposes, an explicit example of a globally consistent D6-brane model with MSSM-like spectrum on $T^6/(\mathbb{Z}_2 \times \mathbb{Z}_6 \times \Omega {\cal R})$ is presented.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-30 |