Low scale composite Higgs model and 1.8 similar to 2 TeV diboson excess

doi:10.1142/S0217751X18410075

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	Low scale composite Higgs model and 1.8 similar to 2 TeV diboson excess
	Liu, D 1; Bian, LG ; Shu, J1,2
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS A
	2018
卷号	33 期号:11 页码:1841007
关键词	PHENOMENOLOGICAL LAGRANGIANS
ISSN号	0217-751X
DOI	10.1142/S0217751X18410075
英文摘要	We consider a simple solution to explain the recent diboson excess observed by ATLAS and CMS Collaborations in models with custodial symmetry SU(2)(L) x SU(2)(R) -> SU(2)(C). The SU(2)(L) triplet vector boson rho with mass range of 1.8 similar to 2 TeV would be produced through the Drell Yan process with sizable diboson decay branching to account for the excess. The other SU(2)(L) x SU(2)(R) bidoublet axial vector boson a would cancel all deviations of electroweak obervables induced by rho even if the SM fermions mix with some heavy vector-like (composite) fermions which couple to rho ("nonuniversally partially composite"), therefore allows arbitrary couplings between each SM fermion and rho. We present our model in the "General Composite Higgs" framework with SO(5) x U(1)(X) > SO(4) x U(1)(X) breaking at scale f and demand the first Wein-berg sum rule and positive gauge boson form factors as the theoretical constraints. We find that our model can fit the diboson excess very well if the left-handed SM light quarks, charged leptons and tops have zero, zero/moderately small and moderate/large composite components for reasonable values of g(rho) and f. The correlation between tree level S parameter and the h -> Z gamma suggest a large a contribution to h -> Z gamma and it is indeed a Omicron(1) effect in our parameter space which provides a strong hint for our scenario if this diboson excess is confirmed by the 13 similar to 14 TeV LHC Run II.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22918]
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, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China 3.CAS Ctr Excellence Particle Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, D,Bian, LG,Shu, J. Low scale composite Higgs model and 1.8 similar to 2 TeV diboson excess[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2018,33(11):1841007.
APA	Liu, D,Bian, LG,&Shu, J.(2018).Low scale composite Higgs model and 1.8 similar to 2 TeV diboson excess.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,33(11),1841007.
MLA	Liu, D,et al."Low scale composite Higgs model and 1.8 similar to 2 TeV diboson excess".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 33.11(2018):1841007.