P. M. Ferreira, Renato Guedes, John F. Gunion, Howard E. Haber, Marco O. P. Sampaio, Rui Santos
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6 pages, 2 figures, to appear in the proceedings of the 22nd International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2014), 28 April - 2 May 2014 Warsaw (Poland)
We confront the most common CP-conserving 2HDM with the LHC data analysed so far while taking into account all previously available experimental data. A special allowed corner of the parameter space is analysed - the so-called wrong-sign scenario where the Higgs coupling to down-type quarks changes sign relative to the Standard Model while the coupling to the massive vector bosons does not.
Model-independent study on the anomalous $ZZγ$ and $Zγγ$ couplings at the future muon collider
在这项研究中,我们研究了$μ^{-} μ^{+}\to Zγ\to ν\barνγ$过程在未来的μ子对撞机上的潜在的质量中心的能量为3 TeV的检查异常$ZZγ$和$Zγγ$中性三重规范耦合定义$CP$守恒$C_{\widetilde{B}W}/{Λ^4}$耦合和三个$CP$违反$C_{BB}/{Λ^4}$,$C_{BW}/{Λ^4}$,$C_{WW}/{Λ^4}$耦合。所有信号和相关背景事件都在MadGraph中生成,并通过Pythia进行部分子淋浴和强子化。探测器的影响也被认为是通过调谐μ介子探测器卡在Delphes。研究了$0\%$、$3\%$和$5\%$的系统不确定度对灵敏度的影响。从过程$μ^{-} μ^{+}\to Zγ\to ν\barνγ$获得的最佳灵敏度分别是$CP$上的$[-6.53;6.64]\times10^{-2}$ TeV $^{-4}$-保守的$C_{\widetilde{B}W}/{Λ^4}$偶联和$[-2.47;2.47]\times10^{-2}$ TeV $^{-4}$、$[-8.46;8.46]\times10^{-2}$ TeV $^{-4}$和$CP$上的$[-2.20;2.20]\times10^{-1}$ TeV $^{-4}$-保守的$C_{BB}/{Λ^4}$、$C_{BW}/{Λ^4}$、$C_{WW}/{Λ^4}$偶联。我们得…
Probing the CP Property of ALP-photon Interactions at Future Lepton Colliders
Center for High Energy Physics, Peking University(北京大学高能物理中心);School of Physics and Astronomy, Beijing Normal University(北京师范大学物理与天文学院);Key Laboratory of Multiscale Spin Physics (Ministry of Education), Beijing Normal University(北京师范大学多尺度自旋物理教育部重点实验室);State Key Laboratory of Nuclear Physics and Technology, Institute of Quantum Matter, South China Normal University(华南师范大学量子物质研究院核物理与技术国家重点实验室);Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Nuclear Science(广东省基础学科研究中心(物质结构与基本相互作用)、广东省核科学重点实验室)
SUSY induced top quark FCNC decay $t \to c h$ after Run I of LHC
鉴于希格斯玻色子的发现和在大型强子对撞机上未观测到超对称粒子,我们重新审视了超对称诱导的顶夸克味变衰变为希格斯玻色子。通过考虑Higgs质量测量、LHC对SUSY的搜索、真空稳定性、精确电弱观测量以及$B \to X_s γ$的约束,我们对相关的SUSY参数空间进行了扫描。我们得到了以下结果:(1)在MSSM中,$ t \to c h$的分支比只能达到$3.0\times10^{-6}$,这比LHC出现之前的结果小了一个数量级。在考虑的约束,希格斯质量和LHC搜索sparticles被发现发挥了重要作用,限制预测。(2)在MSSM的单重态扩展中,由于夸克扇区不受Higgs质量的限制,$t \to c h$的分支比在允许的参数空间中可以达到$10^{-5}$的量级. (3)在重超对称极限下,手性守恒的混合物$δ_{LL}$和$δ_{RR}$对$t \to c h$可能有抑制作用.在方子和胶子能量大于3TeV,CP奇Higgs玻色子质量约为1TeV的MSSM中,$t\to c h$的分支比仍能达到$10^{-8}$的量级.
Experimental search potential for sbottom via $\tildeχ^{\pm}_1$ decays at the LHC Run-3 and HL-LHC, in final states with same-sign leptons and multiple jets