# D-brane Standard Model-Like and Scalar Dark Matter in Type IIA Superstring Theory

## TL;DR

This paper explores a string theory-inspired extension of the Standard Model with a scalar dark matter candidate, analyzing its implications for collider physics and dark matter relic density within a Type IIA superstring framework.

## Contribution

It introduces a D-brane model that extends the Standard Model with a scalar dark matter candidate and examines its phenomenological implications.

## Key findings

- Scalar dark matter mass is constrained to be less than 1000 GeV.
- Higgs portal coupling is found to be less than 10^{-8}.
- Model aligns with current dark matter relic density observations.

## Abstract

In light of the present LHC Run II at $\sqrt{s}=13$ $TeV$, string y standard-like model is studied. Concretely, a singlet $S $ scalar-extended SM given in terms four stacks of intersecting D6-branes in a type IIA superstring compactification producing a large gauge symmetry is examined. The involved scales are dealt with. According to the dark matter relic density, the mass of the scalar dark matter beyond the SM $m_{S}\lesssim 10^{3}GeV$ and the corresponding Higgs portal couplings $\lambda _{SH}\lesssim 10^{-8}$ are approached.