Neutralino dark matter in the extension of MSSM with two triplets and singlet

Zhong-Jun Yang; Jin-Lei Yang; Shu-Min Zhao; Xing-Gang Wu; Tai-Fu Feng

doi:10.1140/epjc/s10052-024-13592-x

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 1216
https://doi.org/10.1140/epjc/s10052-024-13592-x

Regular Article

Neutralino dark matter in the extension of MSSM with two triplets and singlet

Zhong-Jun Yang¹^a, Jin-Lei Yang², Shu-Min Zhao², Xing-Gang Wu¹ and Tai-Fu Feng¹^,2

¹ Department of Physics, Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University, 401331, Chongqing, People’s Republic of China
² Department of Physics, Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Hebei University, 071002, Baoding, People’s Republic of China

^a zj_yang@cqu.edu.cn

Received: 9 April 2024
Accepted: 6 November 2024
Published online: 25 November 2024

Abstract

In an extension of MSSM with two triplets and a singlet, called the TNMSSM, there are seven neutralinos which can enrich the study of cold dark matter if one expects that the weakly interacting massive particle (WIMP) is responsible for the observation of Planck satellite. Such a model, compared to the MSSM, can naturally offer a solution to the $μ$ $\mu$ problem, and its lightest neutralino, which is bino-like, can also provide a correct relic density by using the coannihilation mechanism due to the newly added triplinos. Taking into account the related experimental measurements, such as the bound on the SM-like Higgs mass, the B meson rare decays, the anomalous magnetic moment of the muon $a_{μ}$ $a_\mu$ , the Large Hadron Collider (LHC) measurements and the latest dark matter direct detection experiment LUX-ZEPLIN (LZ), the TNMSSM parameter space can be strictly limited. In respect to all the constraints mentioned above, we find that a bino-like neutralino with a mass in the region $[100, 450] GeV$ $[100, 450]~\textrm{GeV}$ can successfully account for the correct dark matter relic density. Additionally, most of the viable parameter space can be tested in the near future experiments such as the Xenon-nT experiment or LHC.

© The Author(s) 2024

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