Guo, J (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属:
[Guo, Jun; Li, Tianjun; Liu, Yandong] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Guo, Jun; Li, Tianjun; Liu, Yandong] Chinese Acad Sci, Inst Theoret Phys, KITPC, Beijing 100190, Peoples R China; [Kang, Zhaofeng] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China; [Li, Tianjun] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China
英文摘要:
The discovery of a relatively heavy Standard Model (SM)-like Higgs boson challenges naturalness of the minimal supersymmetric standard model (MSSM) from both Higgs and dark matter (DM) sectors. We study these two aspects in the MSSM extended by the low-scale inverse seesaw mechanism. Firstly, it admits a sizable radiative contribution to the Higgs boson mass m (h) , up to similar to 4 GeV in the case of an IR-fixed point of the coupling Y (nu) LH (u) nu (c) and a large sneutrino mixing. Secondly, the lightest sneutrino, highly complex as expected, is a viable thermal DM candidate. Owing to the correct DM relic density and the XENON100 experimental constraints, two scenarios survive: a Higgs-portal complex DM with mass lying around the Higgs pole or above W threshold, and a coannihilating DM with slim prospect of detection. Given an extra family of sneutrinos, both scenarios naturally work when we attempt to suppress the DM left-handed sneutrino component, confronting with enhancing m (h) .
Guo, J,Kang, ZF,Li, TJ,et al. Higgs boson mass and complex sneutrino dark matter in the supersymmetric inverse seesaw models[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(2):80.
