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Impact of the LZ Experiment on DM Phenomenology and Naturalness in the MSSM

Author:
Li Dongwei, Meng Lei, Zhou Haijing
Keyword:
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph)
journal:
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date:
2023-12-04 00:00:00
Abstract
Taking the bino-dominated dark matter (DM) as an example, through approximate analytical formulas and numerical results, this paper analyzes impact of the LUX-ZEPLIN (LZ) Experiment on DM phenomenology and naturalness in Minimal Super-symmetric Standard Model(MSSM). It concluded that under the limitation of the latest LZ experiment, MSSM suffers unattractive fine-tunings. The reason is that the latest LZ experiment results improve $\mu$ bounds, e.g., for the cases of the Z- or h-mediated resonant annihilations to achieve the measured dark matter density, the LZ experiment require $\mu$ should be larger than about $500~{\rm GeV}$ or TeV magnitude, which imply a tuning to predict the $Z$-boson mass and simultaneously worsen the naturalness of the $Z$- and $h$-mediated resonant annihilations to achieve the measured dark matter density.
PDF: Impact of the LZ Experiment on DM Phenomenology and Naturalness in the MSSM.pdf
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