Singlino-dominated dark matter in general NMSSM

被引：13
作者：
Cao, Junjie [1 ]
Li, Demin [1 ]
Lian, Jingwei [1 ]
Yue, Yuanfang [1 ]
Zhou, Haijing [1 ]
机构：
[1] Henan Normal Univ, Dept Phys, Xinxiang 453007, Henan, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Supersymmetry Phenomenology; RELIC DENSITY; MODEL; PROGRAM; TOOL; MICROMEGAS; NUCLEON; PHYSICS; SPHENO;
D O I：
10.1007/JHEP06(2021)176
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The general Next-to-Minimal Supersymmetric Standard Model (NMSSM) describes the singlino-dominated dark-matter (DM) property by four independent parameters: singlet-doublet Higgs coupling coefficient lambda, Higgsino mass mu(tot), DM mass m (chi) over tilde (0)(1), and singlet Higgs self-coupling coefficient kappa. The first three parameters strongly influence the DM-nucleon scattering rate, while kappa usually affects the scattering only slightly. This characteristic implies that singlet-dominated particles may form a secluded DM sector. Under such a theoretical structure, the DM achieves the correct abundance by annihilating into a pair of singlet-dominated Higgs bosons by adjusting kappa's value. Its scattering with nucleons is suppressed when lambda v/mu(tot) is small. This speculation is verified by sophisticated scanning of the theory's parameter space with various experiment constraints considered. In addition, the Bayesian evidence of the general NMSSM and that of Z(3)-NMSSM is computed. It is found that, at the cost of introducing one additional parameter, the former is approximately 3.3 x 10(3) times the latter. This result corresponds to Jeffrey's scale of 8.05 and implies that the considered experiments strongly prefer the general NMSSM to the Z(3)-NMSSM.
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页数：27
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