Connecting muon anomalous magnetic moment and multi-lepton anomalies at LHC

作     者：Danielle Sabatta Alan S.Cornell Ashok Goyal Mukesh Kumar Bruce Mellado Xifeng Ruan Danielle Sabatta;Alan S.Cornell;Ashok Goyal;Mukesh Kumar;Bruce Mellado;Xifeng Ruan

作者机构：School of Physics and Institute for Collider Particle PhysicsUniversity of the WitwatersrandJohannesburgWits 2050South Africa Department of PhysicsUniversity of JohannesburgP.O.Box 524Auckland Park 2006South Africa iThemba LABSNational Research FoundationP.O.Box 722Somerset West 7129South Africa 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2020年第44卷第6期

页      面：26-33页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：the support from the South African Department of Science and Innovation through the SA-CERN program the National Research Foundation for various forms of support 

主　　题：muon g-2 beyond standard model 2HDM+S 

摘      要：In a previous paper by several of the authors a number of predictions were made in a study pertaining to the anomalous production of multiple leptons at the Large Hadron Collider(LHC). Discrepancies in multi-lepton final states have become statistically compelling with the available Run 2 data. These could be connected with a heavy boson, H, which predominantly decays into a standard model Higgs boson, h, and a singlet scalar, S, where mH≈270 GeV and mS≈150 GeV. These can then be embedded into a scenario where a two-Higgs-doublet is considered with an additional singlet scalar, 2HDM+S. The long-standing discrepancy in the muon anomalous magnetic moment,△aμ, is interpreted in the context of the 2HDM+S type-II and type-X, along with additional fermionic degrees of freedom. The 2 HDM+S model alone, with constraints from the LHC data, does not seem to explain the △aμ ***, adding fermions with mass of order O(100) GeV can explain the discrepancy for sufficiently low values of fermion-scalar couplings.