Higgs-portal dark matter in the nonlinear MSSM
Higgs-portal dark matter in the nonlinear MSSM
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DOI：
10.1103/physrevd.103.015027
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发表时间：
2020-08
影响因子：
5
通讯作者：
M. Arai;N. Okada
中科院分区：
文献类型：
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作者：
M. Arai;N. Okada
标准模型的超对称扩展是超越标准模型的新物理学的主要候选者。如果超对称性破缺尺度很小，例如在多TeV范围内，且除Goldstino（引力子）外的超对称性破缺扇区与低能谱解耦，则利用Goldstino手征超场（$X$）在幂零条件${X}^{2}=0$下很好地描述了最小超对称性模型（MSSM）中的隐扇区效应.虽然这种所谓的“非线性MSSM”（NL-MSSM）提供了各种有趣的现象，但存在一个宇宙学问题，即最轻的超伴引力子太轻，不能成为我们宇宙中暗物质（DM）的主要成分。为了解决这个问题，我们提出了一个最小的扩展NL-MSSM通过引入奇偶奇SM单重手征超场（$\mathrm{\ensuremath{\Phi}}$）。结果表明，在消除Goldstino超场的F分量后，$\mathrm{\ensuremath{\Phi}}$中的标量分量与MSSM Higgs二重态的相互作用被诱导，并且$\mathrm{\ensuremath{\Phi}}$中最轻的真实的标量起着Higgs门DM的作用.通过选择合适的模型参数，可以实现一个成功的Higgs-portal DM场景。此外，当超对称性破缺尺度在多TeV范围内时，树能级Higgs势通过低尺度超对称性破缺效应可以获得125 GeV的类SM Higgs玻色子质量.
Supersymmetric (SUSY) extension of the Standard Model (SM) is a primary candidate for new physics beyond the SM. If SUSY breaking scale is very low, for example, the multi-TeV range, and the SUSY breaking sector, except for the Goldstino (gravitino), is decoupled from the low energy spectrum, the hidden sector effect in the minimal SUSY SM (MSSM) is well described by employing the Goldstino chiral superfield ($X$) with the nilpotent condition of ${X}^{2}=0$. Although this so-called ``nonlinear MSSM'' (NL-MSSM) provides a variety of interesting phenomenologies, there is a cosmological problem that the lightest superpartner gravitino is too light to be the major component of the dark matter (DM) in our Universe. To solve this problem, we propose a minimal extension of the NL-MSSM by introducing a parity-odd SM singlet chiral superfield ($\mathrm{\ensuremath{\Phi}}$). We show that the interaction of the scalar component in $\mathrm{\ensuremath{\Phi}}$ with the MSSM Higgs doublets is induced after eliminating $F$ component of the Goldstino superfield, and the lightest real scalar in $\mathrm{\ensuremath{\Phi}}$ plays the role of the Higgs-portal DM. With a suitable choice of the model parameters, a successful Higgs-portal DM scenario can be realized. In addition, if SUSY breaking scale lies in the multi-TeV range, the SM-like Higgs boson mass of 125 GeV can be achieved by the tree-level Higgs potential through the low-scale SUSY breaking effect.