提交时间： 2017-05-02
Gao, JH [Gao, Junhua][ 1 ]
Wu, L [Wu, Liang][ 1 ]
Tu, CJ [Tu, Chengjun][ 1 ]
Cao, HT [Cao, Hongtao][ 1 ]
Jin, AP [Jin, Aiping][ 2 ]
摘要：A new route to fast prepare well-aligned nanocrystalline Si nanorod array by mid-frequency [MF] magnetron sputtering was proposed in this study. Pulsed bias technique has been employed to adjust ion-bombardment condition over the growing film surface. For
分类： 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 minimal supersymmetric standard model the R-parity violating interactions can trigger various exotic three-body decays for the top quark, which may be accessible at the LHC. In this work we examine the R-violating decays t-> c X_1 X_2, which includ
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：We examine the lepton flavor-changing processes in R -parity violating MSSM. First, we update the constraints on the relevant R -violating couplings by using the latest data on the rare decays ? i → ? j γ . We find that the updated constraints are much st
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：We examine various direct and indirect constraints on the lepton-specific two-Higgs doublet model and scrutinize the property of the Higgs bosons in the allowed parameter space. These constraints come from the precision electroweak data, the direct search
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：The top quark forward-backward asymmetry A_{FB}^{t} measured at the Tevatron is above the Standard Model prediction by more than 2-sigma deviation, which might be a harbinger for new physics. In this work we examine the new physics contribution to A_{FB}^
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：Extensions of the Standard Model often predict new chiral interactions for top quark, which will contribute to top quark spin correlation and polarization in tt?tt?t\bar{t} production at the LHC. In this work, under the constraints from the current Tevatr
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：The anomaly of the top quark forward-backward asymmetry AtFBAFBtA^t_{FB} observed at the Tevatron can be explained by the t-channel exchange of a neutral gauge boson (Z') which has sizable flavor changing coupling for top and up quarks. This gauge boson c
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：As a top quark factory, the LHC can test the new physics models used to explain the top quark forward-backward asymmetry A^t_FB measured at the Tevatron. In this work we perform a comparative study for two such models: the W'-model and the color triplet d
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：In order to explain the Tevatron anomaly of the top quark forward-backward asymmetry AtFBAFBtA_{FB}^t in the left-right twin Higgs model, we choose to give up the lightest neutral particle of h^h^\hat{h} field as a stable dark matter candidate. Then a new
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：In a topcolor-assisted technicolor model (TC2) with large FCNC top quark couplings, we study its correlated contributions to the top quark forward-backward asymmetry (AF B ) at the Tevatron, the top charge asymmetry (AC) and the triple-top production at the LHC. Under current constraints on the top quark from the LHC and Tevatron (such as the total and differential production rates), we scan the parameter space of such a TC2 model. We find that in the allowed parameter space the TC2 model can explain the Tevatron measured AFB at 2σ level, but meanwhile significantly enhance AC at the LHC. Such enhanced AC, albeit currently allowed by the LHC measurement at 2σ level, will serve as a test of TC2 with the improvement of measurement precision at the LHC. Then with all the constraints (including the requirement to explain AF B at 2σ level and satisfying the current LHC measurement of AC at 2σ level), we find that the TC2 model can induce sizable triple-top production at the 14 TeV LHC (the production rate can maximally reach 16 pb). Due to the low SM backgrounds, the triple-top production can also be a good probe for TC2 model, complementary to AC.
分类： 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 natural supersymmetry scenario in the framework of the R-parity conserving minimal supersymmetric standard model (called natural MSSM) and examine the observability of stop pair production at the LHC. We first scan the parameters of this s
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：Inspired by the recent LHC Higgs data and null search results of supersymmetry (SUSY), we scan the parameter space of the Minimal Supersymmetric Standard Model (MSSM) with relatively heavy sparticles (1-3 TeV). Then in the parameter space allowed by curre
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：The excess of top quark forward-backward asymmetry (AtFBAFBtA^t_{FB}) reported by the Tevatron and the enhancement of the Higgs decay to diphoton observed by the LHC may point to a same origin of new physics. In this note we examined such anomalies in the
分类： 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： 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： 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 recent progress of direct search for the productions of stop pair and sbottom pair at the LHC, we examine the constraints of the search results on the stop (t ̃ ) mass in natural SUSY. We first scan the parameter space of natural SUSY in the framework of MSSM, considering the constraints from the Higgs mass, B-physics and electroweak precision measurements. Then in the allowed parameter space we perform a Monte Carlo simulation for stop pair production followed by t ̃ → tχ ̃0 or t ̃ → bχ ̃+ and sbottom pair production followed by ̃b → bχ ̃0 or ̃b → tχ ̃−. 1111 1111 Using the combined results of ATLAS with 20.1 fb−1 from the search of l + jets + E/ T , hadronic tt ̄+E/T and 2b+E/T, we find that a stop lighter than 600 GeV can be excluded at 95% CL in this scenario.
分类： 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2016-12-28
摘要：We investigate a strategy to search for light, nearly degenerate higgsinos within the natural MSSM at the LHC. We demonstrate that the higgsino mass range μμ\mu in 100?150100?150100-150 GeV, which is preferred by the naturalness, can be probed at 2σ2σ2\si
分类： 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： 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： 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 the Higgs discovery and the nonobservation of sparticles at the LHC, we revisit the supersymmetric theory (SUSY) induced top quark flavor-changing decay into the Higgs boson. We perform a scan over the relevant SUSY parameter space by consider
点击量
待评议
点击量
下载量
评论
