Vetoing cosmogenic muons in a large liquid scintillator.

	Vetoing cosmogenic muons in a large liquid scintillator.
	Grassi; Marco; Evslin; Jarah; Ciuffoli; Emilio; Zhang; Xinmin; Zhang XM(张新民)
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2015
卷号	2015 期号:10 页码:32
关键词	Neutrino Detectors and Telescopes Oscillation
通讯作者	Grassi Marco
英文摘要	At upcoming medium baseline reactor neutrino experiments the spallation Li-9 background will be somewhat larger than the inverse beta decay reactor neutrino signal. We use new FLUKA simulations of spallation backgrounds to optimize a class of veto strategies and find that surprisingly the optimal veto for the mass hierarchy determination has a rejection efficiency below 90%. The unrejected background has only a modest effect on the physics goals. For example Delta chi(2) for the hierarchy determination falls by 1.4 to 3 points depending on the muon tracking ability. The optimal veto strategy is essentially insensitive to the tracking ability, consisting of 2 meter radius, 1.1 second cylindrical vetoes of well tracked muons with showering energies above 3 to 4 GeV and 0.7 second full detector vetoes for poorly tracked muons above 15 to 18 GeV. On the other hand, as the uncertainty in 012 will be dominated by the uncertainty in the reactor neutrino spectrum and not statistical fluctuations, the optimal rejection efficiency for the measurement of theta(12) is 93% in the case of perfect tracking.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI ; CA
WOS记录号	WOS:000363551800001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228879]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Grassi,Marco,Evslin,et al. Vetoing cosmogenic muons in a large liquid scintillator.[J]. JOURNAL OF HIGH ENERGY PHYSICS,2015,2015(10):32.
APA	Grassi.,Marco.,Evslin.,Jarah.,Ciuffoli.,...&张新民.(2015).Vetoing cosmogenic muons in a large liquid scintillator..JOURNAL OF HIGH ENERGY PHYSICS,2015(10),32.
MLA	Grassi,et al."Vetoing cosmogenic muons in a large liquid scintillator.".JOURNAL OF HIGH ENERGY PHYSICS 2015.10(2015):32.