Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise model

doi:http://dx.doi.org/10.1016/j.physletb.2016.02.045

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	Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise model
	Cao, JJ ; Han, CC ; Shang, LL ; Su, W 3; Yang, JM; Zhang, Y 3
刊名	PHYSICS LETTERS B
	2016
卷号	755 页码:456-463
关键词	ELECTROWEAK SYMMETRY-BREAKING PROTON-PROTON COLLISIONS ROOT-S=8 TEV PP COLLISIONS HIGGS BOSONS RESONANCES SEARCH PAIRS ANATOMY QUARK
DOI	http://dx.doi.org/10.1016/j.physletb.2016.02.045
英文摘要	The evidence of a new scalar particle X from the 750 GeV diphoton excess, and the absence of any other signal of new physics at the LHC so far suggest the existence of new colored scalars, which may be moderately light and thus can induce sizable Xgg and X gamma gamma couplings without resorting to very strong interactions. Motivated by this speculation, we extend the Manohar-Wise model by adding one gauge singlet scalar field. The resulting theory then predicts one singlet dominated scalar phi as well as three kinds of color-octet scalars, which can mediate through loops the phi gg and phi gamma gamma interactions. After fitting the model to the diphoton data at the LHC, we find that in reasonable parameter regions the excess can be explained at 1 sigma level by the process gg -> phi -> gamma gamma.,and the best points predict the central value of the excess rate with chi(2)(min) = 2.32, which corresponds to a p-value of 0.68. We also consider the constraints from various LHC Run I signals, and we conclude that, although these constraints are powerful in excluding the parameter space of the model, the best points are still experimentally allowed. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
资助机构	National Natural Science Foundation of China (NNSFC) [10821504, 11222548, 11121064, 11135003, 90103013, 11275245] ; CAS Center for Excellence in Particle Physics (CCEPP) ; World Premier International Research Center Initiative (WPI Initiative) ; MEXT, Japan
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23191]
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.Acad Sinica, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China 3.Univ Tokyo, Kavli IPMU WPI, Kashiwa, Chiba 2778583, Japan
推荐引用方式 GB/T 7714	Cao, JJ,Han, CC,Shang, LL,et al. Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise model[J]. PHYSICS LETTERS B,2016,755:456-463.
APA	Cao, JJ,Han, CC,Shang, LL,Su, W,Yang, JM,&Zhang, Y.(2016).Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise model.PHYSICS LETTERS B,755,456-463.
MLA	Cao, JJ,et al."Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise model".PHYSICS LETTERS B 755(2016):456-463.