Model-independent determination of the axial mass parameter in quasielastic antineutrino-nucleon scattering

被引：22

作者：

Bhattacharya, Bhubanjyoti ^{[1
]}

Paz, Gil ^{[2
]}

Tropiano, Anthony J. ^{[3
]}

机构：

[1] Univ Montreal, Phys Particules, Montreal, PQ H3C 3J7, Canada

[2] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 11期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevD.92.113011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Understanding the charged current quasielestic (CCQE) neutrino-nucleus interaction is important for precision studies of neutrino oscillations. The theoretical description of the interaction depends on the combination of a nuclear model with the knowledge of form factors. While the former has received considerable attention, the latter, in particular, the axial form factor, is implemented using the historical dipole model. Instead, we use a model-independent approach, presented in a previous study, to analyze the muon-antineutrino CCQE mineral oil data published by the MiniBooNE collaboration. We combine the cross section for scattering of antineutrinos off protons in carbon and hydrogen, using the same axial form factor for both. The extracted value of the axial mass parameter mA = 0.84(-0.04)(+0.12) +/- 0.11 GeV is in very good agreement with the model-independent value extracted from MiniBooNE's neutrino data. Going beyond a one-parameter description of the axial form factor, we extract values of the axial form factor in the range of Q(2) = 0.1... 1.0 GeV2, finding a very good agreement with the analogous extraction from the neutrino data. We discuss the implications of these results.

引用

页数：8

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