MSSM parameters from supergravity backgrounds

TL;DR

This paper derives MSSM parameters from supergravity backgrounds in a D-brane model, linking string theory compactifications to particle physics phenomenology.

Contribution

It provides a framework to compute MSSM parameters directly from supergravity fields in a specific D-brane setup, bridging string theory and particle phenomenology.

Findings

Computed MSSM particle masses from background fluxes

Established relations between supergravity fields and soft SUSY-breaking terms

Developed a method to connect brane models with low-energy physics

Abstract

We find the parameters of the MSSM in terms of bulk supergravity fields for the D-brane model of Berenstein, Jejjala and Leigh (hep-ph/0105042). The model consists of a D3-brane at the singularity of a non-abelian orbifold \Delta_{27}, which gives the particles of the Supersymmetric Standard Model. We compute the action for the D-brane fields in the presence of both supersymmetric and supersymmetry breaking background fluxes. We get quark, lepton, gaugino, Higgsino, scalar partners and Higgs masses, as well as soft trilinear couplings, as functions of the background fields. This work develops a framework for connecting MSSM phenomenology to brane compactifications.