A Promising Interpretation of Diphoton Resonance at 750 GeV

分类： 物理学 >> 核物理学 提交时间： 2016-09-22

Xiao-Jun Bi Ran Ding ,Yizhou Fan Li Huang Chuang Li Tianjun Li Shabbar Raza Xiao-Chuan Wang Bin Zhu

摘要： Recently, an excess of events in diphoton channel with invariant mass of about 750 GeV has been reported by the ATLAS and CMS Collaborations. Considering it as a tantalizing hint for new physics beyond the Standard Model (SM), we propose a simple extension of the SM with an additional doublet Higgs H′ and a singlet s. We consider the neutral component H′0 of H′ as the 750 GeV resonance, and assume that s is lighter than 2.6 GeV. In particular, H′0 can be produced at tree level via qq¯ production, and decay into a pair of s at tree level. And then s can decay into a pair of collimated photons, which cannot be distinguished at the LHC. We show that the diphoton production cross section can be from 3 to 13 fb, the decay width of H′0 can be from 30 to 60 GeV, and all the current experimental constraints including dijet constraint can be satisfied.

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