Title:

125 GeV Higgs Boson And Enhanced Di-photon Rate

Speaker:

Tao Liu

Time and place:

14:00, Aug. 6th (Monday),2012

Lecture Hall/INPAC (beat365官方网站粒子物理宇宙学研究所，包玉刚图书馆东楼四楼(从北门进)

Abstract:

The  ATLAS and CMS collaborations have announced discovery of a    125 GeV  Higgs boson, after a combined analysis of the di-photon and ZZ search   channels. This observation has signicant impact on low-energy  supersymmetry. First, some  fine-tuning is necessary to accommodate such  a Higgs mass in the  Minimal Supersymmetric Standard Model (MSSM)  because the tree-level mass  of the SM-like Higgs boson in the MSSM is  relatively small.
Second, the  observed di-phton rate is about twice of the SM  prediction, while in the MSSM  it tends to be suppressed. We explicitly  show that in the D-term extensions  of the MSSM, the SM-like Higgs  mass and its di-photon decay width can get  sizable corrections from  the D-terms and exotics for anomaly cancelation,  respectively.  An enhanced di-photon rate as well as a mass  ~125 GeV for  the
SM-like Higgs boson therefore can be simultaneously achieved.