There is strong evidence for the 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 ${\chi }_L^0$ and $\tilde{Y}$ as candidates for dark matter in the EBLMSSM. We study the dominant annihilation processes in detail, including ${\overline{\chi }}_L^0{\chi }_L^0(\overline{\tilde{Y}}\tilde{Y})\to {\overline{l}}^I{l}^I$ and ${\overline{\chi }}_L^0{\chi }_L^0(\overline{\tilde{Y}}\tilde{Y})\to {\overline{\nu }}^I{\nu }^I$. We calculate their annihilation cross section $\sigma$ and relic density ${\mathrm{\Omega }}_D{h}^2$. Then we analyze the limitations of dark matter relic density on the parameters of the EBLMSSM.

• Received 23 January 2019

DOI:https://doi.org/10.1103/PhysRevD.99.095033

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society