Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector

	Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector
	ATLAS Collaboration
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2015
卷号	2015 期号:11 页码:206
关键词	Supersymmetry Hadron-Hadron Scattering Higgs physics Dark matter
英文摘要	The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb(-1) of pp collision data at root S = 7 TeV and 20.3 fb(-1) at root s = 8 TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the gamma gamma, ZZ, WW, Z gamma, bb, tau tau, and mu mu decay channels, along with results from the associated production of a Higgs boson with a top-quark pair, are used to probe the scaling of the couplings with mass. Limits are set on parameters in extensions of the Standard Model including a composite Higgs boson, an additional electroweak singlet, and two-Higgs-doublet models. Together with the measured mass of the scalar Higgs boson in the gamma gamma and ZZ decay modes, a lower limit is set on the pseudoscalar Higgs boson mass of m(A) > 370 GeV in the "hMSSM" simplified Minimal Supersymmetric Standard Model. Results from direct searches for heavy Higgs bosons are also interpreted in the hMSSM. Direct searches for invisible Higgs boson decays in the vector-boson fusion and associated production of a Higgs boson with W/Z (Z -> ll, W/Z -> jj) modes are statistically combined to set an upper limit on the Higgs boson invisible branching ratio of 0.25. The use of the measured visible decay rates in a more general coupling fit improves the upper limit to 0.23, constraining a Higgs portal model of dark matter.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000366625100001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/229079]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	ATLAS Collaboration. Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2015,2015(11):206.
APA	ATLAS Collaboration.(2015).Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS,2015(11),206.
MLA	ATLAS Collaboration."Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS 2015.11(2015):206.