Theoretical study on light Higgs boson scenario in the minimal supersymmetric standard model

基本粒子的标准模型（SM）是非常成功的。然而，在LHC实验开始之前，SM中的希格斯玻色子尚未被发现。因此，已经提出了许多超出SM的理论场景。在这项研究中，我们考虑的最小超对称标准模型（MSSM）内的轻希格斯玻色子的情况下，有一个轻希格斯玻色子的质量约为100 GeV。在这样的轻希格斯玻色子方案中，不仅像LEP这样的直接搜索实验，而且像B工厂和味实验这样的间接搜索实验都是非常重要的。我们研究了轻Higgs玻色子对B物理的影响，并表明B物理对轻Higgs玻色子有很强的约束。此外，自从LHC启动并发现了SM Higgs类新粒子以来，SM之外的新物理场景强烈地约束了对SM Higgs类新粒子的解释。我们发现，轻希格斯玻色子的情况下，也强烈限制了目前的大型强子对撞机的结果。目前的LHC实验还没有观察到任何新的粒子，除了SM希格斯玻色子类粒子。然而，据报道，有一个实验结果之间的差异和SM预测的μ子异常磁矩（μ子g-2）。因此我们研究了可以解释μ介子g-2异常的新物理模型，并指出仍有一些区域与目前的实验结果相一致。指出了未来LHC的研究对探索μ g-2异常的新物理模型具有重要意义。

The standard model of elementary particles (SM) has been very successful. However, before the LHC experiment started, the Higgs boson in the SM has not been discovered yet. Therefore many theoretical scenarios beyond the SM have been proposed. In this study, we consider the light Higgs boson scenario within the minimal supersymmetric standard model (MSSM) where there is a light Higgs boson whose mass is about 100 GeV. In such a light Higgs boson scenario, not only the direct search experiment such as the LEP, but also the indirect search experiments such as B factory and flavor experiments are very important. We studied the effects of the light Higgs boson on B physics, and showed that the B physics strongly constrained the light Higgs boson scenario. Furthermore, since the LHC started and discovered a SM Higgs-like new particle, the new physics scenarios beyond the SM are strongly constrained to explain the SM Higgs like new particle. We find that the light Higgs boson scenario is also strongly constrained by the current LHC results. The current LHC experiment has not been observed any new particles except the SM Higgs boson like particle. However, it has been reported that there is a discrepancy between the experimental result and the SM prediction of the muon anomalous magnetic moment (muon g-2). Therefore we studied the new physics models which can explain the muon g-2 anomaly, and showed that there are still regions which are consistent with the current experimental results. We also pointed out that the future LHC study may be important to probe the new physics models for muon g-2 anomaly.