Probing new physics scales from Higgs and electroweak observables at e(+) e(-) Higgs factory

doi:10.1007/JHEP10(2016)007

	Probing new physics scales from Higgs and electroweak observables at e(+) e(-) Higgs factory
	Ge, Shao-Feng 1; He, Hong-Jian 2,3,4; Xiao, Rui-Qing 2,3,5
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2016-10-03
页码	48
关键词	Beyond Standard Model Higgs Physics
ISSN号	1029-8479
DOI	10.1007/JHEP10(2016)007
英文摘要	New physics beyond the standard model (SM) can be model-independently formulated via dimension-6 effective operators, whose coefficients (cutoffs) characterize the scales of new physics. We study the probe of new physics scales from the electroweak precision observables (EWPO) and the Higgs observables (HO) at the future e(+)e(-) Higgs factory (such as CEPC). To optimize constraints of new physics from all available observables, we establish a scheme-independent approach. With this formulation, we treat the SM electroweak parameters and the coefficients of dimension-6 operators on equal footing, which can be fitted simultaneously by the same chi(2) function. As deviations from the SM are generally small, we can expand the new physics parameters up to linear order and perform an analytical chi(2) fit to derive the potential reach of the new physics scales. We find that the HO from both Higgs produnction and decay rates can probe the new physics scales up to 10 TeV (and to 44 TeV for the case of gluon-involved operator O-g), and the new physics scales of Yukawa-type operators can be probed by the precision Higgs coupling measurements up to (13 - 25) TeV. Further including the EWPO can push the limit up to 35 TeV. From this prospect, we demonstrate that the EWPO measured in the early phase of a Higgs factory can be as important as the Higgs observables. These indirect probes of new physics scales at the Higgs factory can mainly cover the energy range to be directly explored by the next generation hadron colliders of pp (50 - 100TeV), such as the SPPC and FCC-hh.
资助项目	National NSF of China[11275101] ; National NSF of China[11135003] ; Tsinghua University[20141081211]
WOS关键词	STANDARD MODEL ; PHENOMENOLOGICAL LAGRANGIANS ; MASSLESS PARTICLES ; BROKEN SYMMETRIES ; GAUGE-THEORIES ; DARK-MATTER ; COUPLINGS ; BOSON ; CONSERVATION ; INFLATION
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000385397500002
资助机构	National NSF of China ; Tsinghua University
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/43517]
专题	中国科学院近代物理研究所
通讯作者	Ge, Shao-Feng
作者单位	1.Max Planck Inst Kernphys, D-69117 Heidelberg, Germany 2.Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China 3.Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China 4.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 5.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Ge, Shao-Feng,He, Hong-Jian,Xiao, Rui-Qing. Probing new physics scales from Higgs and electroweak observables at e(+) e(-) Higgs factory[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016:48.
APA	Ge, Shao-Feng,He, Hong-Jian,&Xiao, Rui-Qing.(2016).Probing new physics scales from Higgs and electroweak observables at e(+) e(-) Higgs factory.JOURNAL OF HIGH ENERGY PHYSICS,48.
MLA	Ge, Shao-Feng,et al."Probing new physics scales from Higgs and electroweak observables at e(+) e(-) Higgs factory".JOURNAL OF HIGH ENERGY PHYSICS (2016):48.