利用 MicroBooNE 探测器在 E_{ν}∼0.8 GeV 上首次测量氩的包含μ子中微子带电流微分截面。

First Measurement of Inclusive Muon Neutrino Charged Current Differential Cross Sections on Argon at E_{ν}∼0.8 GeV with the MicroBooNE Detector.

机构信息

University of Michigan, Ann Arbor, Michigan 48109, USA.

Harvard University, Cambridge, Massachusetts 02138, USA.

出版信息

Phys Rev Lett. 2019 Sep 27;123(13):131801. doi: 10.1103/PhysRevLett.123.131801.

DOI:10.1103/PhysRevLett.123.131801

PMID:31697542

Abstract

We report the first measurement of the double-differential and total muon neutrino charged current inclusive cross sections on argon at a mean neutrino energy of 0.8 GeV. Data were collected using the MicroBooNE liquid argon time projection chamber located in the Fermilab Booster neutrino beam and correspond to 1.6×10^{20} protons on target of exposure. The measured differential cross sections are presented as a function of muon momentum, using multiple Coulomb scattering as a momentum measurement technique, and the muon angle with respect to the beam direction. We compare the measured cross sections to multiple neutrino event generators and find better agreement with those containing more complete treatment of quasielastic scattering processes at low Q^{2}. The total flux integrated cross section is measured to be 0.693±0.010(stat)±0.165(syst)×10^{-38} cm^{2}.

摘要

我们报告了首次在平均中微子能量为 0.8GeV 时对氩的缪子中微子带电流内禀散射截面的双微分和总截面的测量结果。该数据是利用费米实验室 Booster 中微子束内的 MicroBooNE 液氩时间投影室采集的，对应于 1.6×10^{20}个质子靶的曝光量。所测量的微分截面是作为缪子动量的函数呈现的，使用多次库仑散射作为动量测量技术，并给出了缪子相对于束流方向的角度。我们将测量的截面与多个中微子事件发生器进行了比较，发现与那些在低 Q^{2}处更完整地处理准弹性散射过程的发生器更为一致。总通量积分截面测量值为 0.693±0.010(stat)±0.165(syst)×10^{-38} cm^{2}。