Towards a realistic Standard Model from D-brane configurations

TL;DR

This paper explores D-brane configurations that can produce realistic Standard Model-like theories, analyzing hypercharge embeddings, string scales, and phenomenological implications such as Yukawa couplings and neutrino physics.

Contribution

It classifies D-brane models based on hypercharge embeddings and evaluates their viability as low-energy effective theories with detailed phenomenological analysis.

Findings

Identified hypercharge embeddings consistent with the SM spectrum

Determined string scale via two-loop renormalization group calculations

Analyzed implications for Yukawa couplings, neutrinos, and flavor changing processes

Abstract

Effective low energy models arising in the context of D-brane configurations with Standard Model (SM) gauge symmetry extended by several gauged abelian factors are discussed. The models are classified according to their hypercharge embeddings consistent with the SM spectrum hypercharge assignment. Particular cases are analyzed according to their perspectives and viability as low energy effective field theory candidates. The resulting string scale is determined by means of a two-loop renormalization group calculation. Their implications in Yukawa couplings, neutrinos and flavor changing processes are also presented.