Technipion limits from LHC Higgs searches

doi:10.1103/PhysRevD.84.115025

	Technipion limits from LHC Higgs searches
	Chivukula, R. Sekhar 1; Ittisamai, Pawin 1; Simmons, Elizabeth H.1; Ren, Jing 2,3
刊名	PHYSICAL REVIEW D
	2011-12-28
卷号	84 页码:13
ISSN号	1550-7998
DOI	10.1103/PhysRevD.84.115025
英文摘要	LHC searches for the standard model Higgs Boson in gamma gamma or tau tau decay modes place strong constraints on the light technipion state predicted in technicolor models that include colored technifermions. Compared with the standard Higgs Boson, the technipions have an enhanced production rate (largely because the technipion decay constant is smaller than the weak scale) and also enhanced branching ratios into di-photon and di-au final states (largely due to the suppression of WW decays of the technipions). These factors combine to make the technipions more visible in both channels than a standard model Higgs would be. Hence, the recent ATLAS and CMS searches for Higgs bosons exclude the presence of technipions with masses from 110 GeV to nearly 2m(t) in technicolor models that (a) include colored technifermions (b) feature topcolor dynamics and (c) have technicolor groups with three or more technicolors (N-TC >= 3). For certain models, the limits also apply out to higher technipion masses or down to the minimum number of technicolors (N-TC = 2). The limits may be softened somewhat in models where extended technicolor plays a significant role in producing the top quark's mass. Additional LHC data on di- tau and di- photon final states will be extremely valuable in further exploring technicolor parameter space.
资助项目	U.S. National Science Foundation[PHY-0854889] ; China Scholarship Council ; Thailand Development and Promotion of Science and Technology Talents Project (DPST)
WOS关键词	NEUTRAL PSEUDOGOLDSTONE BOSONS ; DYNAMICAL SYMMETRY-BREAKING ; TECHNICOLOR THEORIES ; WALKING TECHNICOLOR ; CHIRAL HIERARCHIES ; MASSLESS PARTICLES ; BROKEN SYMMETRIES ; WEAK INTERACTIONS ; STANDARD MODEL ; HYPERCOLOR
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000298643700004
资助机构	U.S. National Science Foundation ; China Scholarship Council ; Thailand Development and Promotion of Science and Technology Talents Project (DPST)
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/35092]
专题	中国科学院近代物理研究所
通讯作者	Chivukula, R. Sekhar
作者单位	1.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA 2.Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China 3.Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Chivukula, R. Sekhar,Ittisamai, Pawin,Simmons, Elizabeth H.,et al. Technipion limits from LHC Higgs searches[J]. PHYSICAL REVIEW D,2011,84:13.
APA	Chivukula, R. Sekhar,Ittisamai, Pawin,Simmons, Elizabeth H.,&Ren, Jing.(2011).Technipion limits from LHC Higgs searches.PHYSICAL REVIEW D,84,13.
MLA	Chivukula, R. Sekhar,et al."Technipion limits from LHC Higgs searches".PHYSICAL REVIEW D 84(2011):13.