分类： 物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要： In light of recent remarkable progress in Higgs search at the LHC, we study the rare decay process h→Zγh→Zγh \to Z\gamma and show its correlation with the decay h→γγh→γγh \to \gamma\gamma in low energy SUSY models such as CMSSM, MSSM, NMSSM and nMSSM. Und
分类： 物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要： We consider the current experimental constraints on the parameter space of the MSSM and NMSSM. Then in the allowed parameter space we examine the Higgs pair production at the 14 TeV LHC via bb?→hhbb?→hhb\bar{b}\to hh (hhh is the 125 GeV SM-like Higg boson
分类： 物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要： In SUSY, a light dark matter is usually accompanied by light scalars to achieve the correct relic density, which opens new decay channels of the SM like Higgs boson. Under current experimental constraints including the latest LHC Higgs data and the dark m
分类： 物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要： Motivated by the future precision test of the Higgs boson at an e+e?e+e?e^+e^- Higgs factory, we calculate the production e+e?→ZHγe+e?→ZHγe^+e^- \to ZH\gamma in the Standard Model with complete next-to-leading order electroweak corrections. We find that f
分类： 物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要： We explore the explanation of the Fermi Galactic Center excess (GCE) in the next-to-minimal supersymmetric Standard Model. We systematically consider various experimental constraints including the dark matter (DM) relic density, DM direct detection result
分类： 物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要： In the Next-to-Minimal Supersymmetric Standard Model (NMSSM), all singlet-dominated particles including one neutralino, one CP-odd Higgs boson and one CP-even Higgs boson can be simultaneously lighter than about 100 GeV. Consequently, dark matter (DM) in the NMSSM can annihilate into multiple final states to explain the galactic center gamma-ray excess (GCE). In this work we take into account the foreground and background uncertainties for the GCE and investigate these explanations. We carry out a sophisticated scan over the NMSSM parameter space by considering various experi- mental constraints such as the Higgs data, B-physics observables, DM relic density, LUX experiment and the dSphs constraints. Then for each surviving parameter point we per- form a fit to the GCE spectrum by using the correlation matrix that incorporates both the statistical and systematic uncertainties of the measured excess. After examining the properties of the obtained GCE solutions, we conclude that the GCE can be well explained by the pure annihilations χ ̃01χ ̃01 → b ̄b and χ ̃01χ ̃01 → A1Hi with A1 being the lighter singlet- dominated CP-odd Higgs boson and Hi denoting the singlet-dominated CP-even Higgs boson or SM-like Higgs boson, and it can also be explained by the mixed annihilation χ ̃01χ ̃01 → W+W−,A1H1. Among these annihilation channels, χ ̃01χ ̃01 → A1Hi can provide the best interpretation with the corresponding p-value reaching 0.55. We also discuss to what extent the future DM direct detection experiments can explore the GCE solutions and conclude that the XENON-1T experiment is very promising in testing nearly all the solutions.
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