Study of vertex optimization at the CEPC

doi:10.1088/1748-0221/13/09/T09002

	Study of vertex optimization at the CEPC
	Fu, C; Wu Z(吴智); 李刚(实); Yu D(于丹); Fu CD(傅成栋); Ou YQ(欧阳群); Ruan MQ(阮曼奇); Wu, Z; Li, G; Yu, D
刊名	JOURNAL OF INSTRUMENTATION
	2018
卷号	13 页码:T09002
关键词	Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc) Si microstrip and pad detectors
ISSN号	1748-0221
DOI	10.1088/1748-0221/13/09/T09002
文献子类	Article
英文摘要	The CEPC is a planned future collider targeting precise Higgs property measurements. Its core physics program includes the determination of Br(H -> bb), Br(H -> cc), and Br(H -> tau(+)tau(-), whose accuracies are sensitive to the vertex (VTX) design and the performance. This study is performed on Higgsstrahlung events e(+)e(-) -> ZH at root s = 240 GeV, with subsequent Higgs decay to bb; cc and tau tau. Using full simulation, we quantified the dependency between these physics performances and the main VTX geometry parameters: the inner radius, the material budget, and the spatial resolution. We select three benchmark VTX designs, a conservative design according to the upgraded ALICE Inner Tracker System (ITS) geometry, a baseline detector design that is roughly two times better than the upgraded ALICE ITS, and an aggressive design that is roughly four times better. Comparing the physics performance at the aggressive design to the baseline one, we found the Br(H -> cc) measurement is extremely sensitive and the relative accuracy could change up to 40%. The relative accuracy on Br(H -> tau(+)tau(-)) changes by 8%. The Br(H -> bb) is not really sensitive to the VTX parameters and the relative accuracy only changes by 1%. Our analyses also show that the reduction of the inner radius is the most efficient way to improve the performance on Br(H -> cc) measurements.
WOS关键词	BOSON ; LHC
WOS研究方向	Instruments & Instrumentation
语种	英语
WOS记录号	WOS:000443936600001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286288]
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	Fu, C,Wu Z,Li G,et al. Study of vertex optimization at the CEPC[J]. JOURNAL OF INSTRUMENTATION,2018,13:T09002.
APA	Fu, C.,吴智.,李刚.,于丹.,傅成栋.,...&Ruan, M.(2018).Study of vertex optimization at the CEPC.JOURNAL OF INSTRUMENTATION,13,T09002.
MLA	Fu, C,et al."Study of vertex optimization at the CEPC".JOURNAL OF INSTRUMENTATION 13(2018):T09002.