arXiv 1201.30252012-01hep-ex

低能中微子通量的测定方法：低能$ν$方法的研究

Methods to Determine Neutrino Flux at Low Energies:Investigation of the Low $ν$ Method

A. Bodek, U. Sarica, D. Naples, L. Ren

备注：: 25 pages, 32 figures, to be published in European Physics Journal C
发表信息：: The European Physical Journal C - Particles and Fields, 2012, Volume 72, Number 4, 1973
DOI：: 10.1140/epjc/s10052-012-1973-6

摘要：

我们研究了“低$ν$“方法（由CCFR/NUTEV合作开发），以确定在很低的能量，一个感兴趣的区域中微子振荡实验的宽带中微子束的中微子通量。MINOS合作组在测量中微子（$ν_μ$）和反中微子（$\nub_μ$）总截面时，使用了强子末态能量低的事件$ν<ν_{cut}$（1、2和5 GeV）来确定中微子通量。在MINOS中使用该方法的最低$ν_μ$能量为3.5 GeV，最低$\nub_μ$能量为6 GeV。在这些能量下，截面主要是非弹性过程。我们研究了该方法在确定能量低至0.7 GeV的$ν_μ$、$\nub_μ$中微子流中的应用，其中截面主要由准弹性散射和$Δ$（1232）共振产生.我们发现，通过使用0.25和0.50 GeV的$ν_{cut}$值，该方法可以扩展到低能量，这在MINERvA等完全活跃的中微子探测器中是可行的。

英文摘要：

We investigate the "low-$ν$" method (developed by the CCFR/NUTEV collaborations) to determine the neutrino flux in a wide band neutrino beam at very low energies, a region of interest to neutrino oscillations experiments. Events with low hadronic final state energy $ν<ν_{cut}$ (of 1, 2 and 5 GeV) were used by the MINOS collaboration to determine the neutrino flux in their measurements of neutrino ($ν_μ$) and antineutrino ($\nub_μ$) total cross sections. The lowest $ν_μ$ energy for which the method was used in MINOS is 3.5 GeV, and the lowest $\nub_μ$ energy is 6 GeV. At these energies, the cross sections are dominated by inelastic processes. We investigate the application of the method to determine the neutrino flux for $ν_μ$, $\nub_μ$ energies as low as 0.7 GeV where the cross sections are dominated by quasielastic scattering and $Δ$(1232) resonance production. We find that the method can be extended to low energies by using $ν_{cut}$ values of 0.25 and 0.50 GeV, which is feasible in fully active neutrino detectors such as MINERvA.

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