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
学科分类Physics
DOI10.1007/JHEP10(2015)032
通讯作者Grassi Marco
文章类型Article
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.
类目[WOS]Physics, Particles & Fields
收录类别SCI ; CA
WOS记录号WOS:000363551800001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228879
专题中国科学院高能物理研究所_理论物理室_期刊论文
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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.
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