Connecting the LHC diphoton excess to the Galatic Center gamma-ray excess

doi:http://dx.doi.org/10.1103/PhysRevD.94.035019

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	Connecting the LHC diphoton excess to the Galatic Center gamma-ray excess
	Huang, XJ ; Zhang, WH ; Zhou, YF
刊名	PHYSICAL REVIEW D
	2016
卷号	94 期号:3 页码:35019
关键词	ANNIHILATING DARK-MATTER LEFT-RIGHT MODEL 2-HIGGS-DOUBLET MODEL GALACTIC-CENTER ATLAS DETECTOR ROOT-S=8 TEV MUON G-2 HIGGS RESONANCE EMISSION
DOI	http://dx.doi.org/10.1103/PhysRevD.94.035019
英文摘要	The recent LHC Run-2 data have shown a possible excess in diphoton events, suggesting the existence of a new resonance phi with mass M similar to 750 GeV. If phi plays the role of a portal particle connecting the Standard Model and the invisible dark sector, the diphoton excess should be correlated with another photon excess, namely, the excess in the diffuse gamma rays towards the Galactic Center, which can be interpreted by the annihilation of dark matter (DM). We investigate the necessary conditions for a consistent explanation for the two photon excesses, especially the requirement on the width-to-mass ratio Gamma/M and phi decay channels, in a collection of DM models where the DM particle can be scalar, fermionic, and vector, and phi can be generated through s-channel gg fusion or qq annihilation. We show that the minimally required Gamma/M is determined by a single parameter proportional to (m(chi)/M)(n),where the integer n depends on the nature of the DM particle. We find that for the scalar DM model with phi generated from qq annihilation, the minimally required Gamma/M can be as low as Omicron(10(-3)). For the scalar DM model with phi generated from gg fusion and fermionic DM model with phi from qq annihilation, the required Gamma/M are typically of Omicron(10(-2)). The vector DM models, however, require very large Gamma/M of order one. For the DM models which can consistently explain both the excesses, the predicted cross sections for gamma-ray line are typically of Omicron(10(-31)-10(-29)) cm(3) s(-1), which are close to the current limits from the Fermi-LAT experiment.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
资助机构	NSFC [11335012, 11475237]
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23070]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, ZhongGuanCun East Rd 55, Beijing 100190, Peoples R China 2.[Huang, Xian-Jun 3.Zhang, Wei-Hong 4.Univ Chinese Acad Sci, Sch Phys Sci, Yuquan Rd 19A, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, XJ,Zhang, WH,Zhou, YF. Connecting the LHC diphoton excess to the Galatic Center gamma-ray excess[J]. PHYSICAL REVIEW D,2016,94(3):35019.
APA	Huang, XJ,Zhang, WH,&Zhou, YF.(2016).Connecting the LHC diphoton excess to the Galatic Center gamma-ray excess.PHYSICAL REVIEW D,94(3),35019.
MLA	Huang, XJ,et al."Connecting the LHC diphoton excess to the Galatic Center gamma-ray excess".PHYSICAL REVIEW D 94.3(2016):35019.