On distinguishing the direct and spontaneous CP violation in 2HDM

Probing and Distinguishing Representations at the LHC

The discovery made at the Large Hadron Collider (LHC) has revealed that the spontaneous symmetry breaking mechanism is realised in a gauge theory such as the Standard Model (SM) by at least one Higgs doublet. However, the possible existence of other scalar bosons cannot be excluded. We analyze signatures extensions of the SM, characterized by an extra representations of scalars, in view of the recent and previous Higgs data. We show that such representations can be probed and distinguished, mostly with multileptonic final states, with a relatively low luminosity at the LHC.

The Right Side of Tev Scale Spontaneous R-Parity Violation

We study a simple extension of the minimal supersymmetric Standard Model in which the Abelian sector of the theory consists of B-L and right-handed isospin. In the minimal model this Abelian gauge structure is broken to the standard model hypercharge gauge group by non-vanishing vacuum expectation values of the right-handed sneutrinos, resulting in spontaneous R-parity violation. This theory can emerge as a low energy effective theory of a left-right symmetric theory realized at a high scale. We determine the mass spectrum of the theory, and discuss the generation of neutrino masses and R-pari…

对称二重希格斯双重态模型

A Symmetric Two Higgs Doublet Model

本文提出一个具有离散互换对称性的对称二重希格斯双重态模型，其中中性标量H因残余Z2对称性成为暗物质候选，并导致125 GeV希格斯玻色子产生不可见衰变，为LHC实验提供新的搜索方向。