# Study of dark matter in the extended BLMSSM

## TL;DR

This paper investigates dark matter candidates within the extended BLMSSM framework, analyzing their annihilation processes, calculating relic densities, and exploring parameter constraints to better understand dark matter's nature beyond the Standard Model.

## Contribution

It introduces specific dark matter candidates in the EBLMSSM and provides detailed calculations of their annihilation processes and relic densities, extending previous models.

## Key findings

- Calculated annihilation cross sections for dark matter candidates.
- Determined relic density constraints on model parameters.
- Identified parameter regions consistent with observed dark matter density.

## Abstract

There are strong evidences for existence of dark matter in some experiments at present. However, the question is that we do not have a reasonable explanation for dark matter in the framework of the Standard Model(SM) of particle physics. It is necessary to extend the SM in order to explain the dark matter. According to the current possible existence conditions of dark matter, we choose $\chi^0_L$ and $\tilde{Y}$ as candidates for dark matter in the EBLMSSM. We study the dominant annihilation processes in detail, including $\bar{\chi}^0_L\chi^0_L(\bar{\tilde{Y}}\tilde{Y})\rightarrow \bar{l}^Il^I$ and $\bar{\chi}^0_L\chi^0_L(\bar{\tilde{Y}}\tilde{Y})\rightarrow \bar{\nu}^I\nu^I$. And we calculate their annihilation cross section $\sigma$ and relic density $\Omega_D h^2$. Then we analyze the limitations of dark matter relic density on the parameters of the EBLMSSM.