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题名: 750 GeV diphoton excess and a dark matter messenger at the Galactic Center
作者: Huang, XJ ;  Zhang, WH ;  Zhou, YF
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:11, 页码:115006
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.115006
通讯作者: Huang, XJ (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: The first data from the LHC run 2 have shown a possible excess in diphoton events with invariant mass similar to 750 GeV, suggesting the existence of a new resonance which may decay dominantly into dark matter (DM) particles. We show in a simple model that the reported diphoton excess at the LHC is consistent with another photon excess, the 2 GeV excess in cosmic gamma-ray fluxes towards the Galactic Center observed by the Fermi-LAT. Both the excesses can be simultaneously explained by a similar to 60 GeV scalar DM particle annihilating dominantly into two gluons with a typical thermal annihilation cross section, which leads to the prediction of a width-to-mass ratio Gamma/M approximate to O(10(-2)) of the resonance. The upper limit on the dijet search at LHC run 1 leads to a lower limit on the predicted cross section for DM annihilating into gamma gamma final states (gamma gamma) greater than or similar to O(10(-30)) cm(3) s(-1). Both the predictions can be tested by the LHC, Fermi-LAT, and future experiments.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: CP CONSERVATION ;  ATLAS DETECTOR ;  ROOT-S=8 TEV ;  RESONANCE ;  EMISSION ;  SIGNAL ;  GAMMA ;  PSEUDOPARTICLES ;  CONSTRAINTS ;  PHYSICS
收录类别: SCI
项目资助者: NSFC [11335012, 11475237]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21627
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Huang, XJ,Zhang, WH,Zhou, YF. 750 GeV diphoton excess and a dark matter messenger at the Galactic Center[J]. PHYSICAL REVIEW D,2016,93(11):115006.
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