Evidence for the spin-0 nature of the Higgs boson using ATLAS data

	Evidence for the spin-0 nature of the Higgs boson using ATLAS data
	ATLAS collaboration
刊名	PHYSICS LETTERS B
	2013
卷号	726 期号:1--3 页码:120-144
关键词	MASSLESS PARTICLES BROKEN SYMMETRIES LHC MASSES
通讯作者	Ammosov, VV (reprint author), State Res Ctr, Inst High Energy Phys, Protvino, Russia.
英文摘要	Studies of the spin and parity quantum numbers of the Higgs boson are presented, based on protonproton collision data collected by the ATLAS experiment at the LHC. The Standard Model spin-parity J(P) = 0(+) hypothesis is compared with alternative hypotheses using the Higgs boson decays H -> gamma gamma, H -> ZZ* -> 4l and H -> WW* -> l nu l nu, as well as the combination of these channels. The analysed dataset corresponds to an integrated luminosity of 20.7 fb(-1) collected at a centre-of-mass energy of root s = 8 TeV. For the H -> ZZ* -> 4l decay mode the dataset corresponding to an integrated luminosity of 4.6 fb(-1) collected at root s = 7 TeV is included. The data are compatible with the Standard Model J(P) = 0+ quantum numbers for the Higgs boson, whereas all alternative hypotheses studied in this Letter, namely some specific J(P) = 0(-), 1(+), 1(-), 2(+) models, are excluded at confidence levels above 97.8%. This exclusion holds independently of the assumptions on the coupling strengths to the Standard Model particles and in the case of the J(P) = 2(+) model, of the relative fractions of gluon-fusion and quark-antiquark production of the spin-2 particle. The data thus provide evidence for the spin-0 nature of the Higgs boson, with positive parity being strongly preferred. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000326482200015
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213621]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	ATLAS collaboration. Evidence for the spin-0 nature of the Higgs boson using ATLAS data[J]. PHYSICS LETTERS B,2013,726(1--3):120-144.
APA	ATLAS collaboration.(2013).Evidence for the spin-0 nature of the Higgs boson using ATLAS data.PHYSICS LETTERS B,726(1--3),120-144.
MLA	ATLAS collaboration."Evidence for the spin-0 nature of the Higgs boson using ATLAS data".PHYSICS LETTERS B 726.1--3(2013):120-144.