在MINERvA实验中同时测量μ子中微子νₘ在CH、C、H₂O、Fe和Pb靶中的带电流单π⁺产生。

Simultaneous Measurement of Muon Neutrino ν_{μ} Charged-Current Single π^{+} Production in CH, C, H_{2}O, Fe, and Pb Targets in MINERvA.

作者信息

Bercellie A, Kroma-Wiley K A, Akhter S, Ahmad Dar Z, Akbar F, Ansari V, Ascencio M V, Athar M Sajjad, Bellantoni L, Betancourt M, Bodek A, Bonilla J L, Bravar A, Budd H, Caceres G, Cai T, Díaz G A, da Motta H, Dytman S A, Felix J, Fields L, Filkins A, Fine R, Gago A M, Gallagher H, Gaur P K, Ghosh A, Gilligan S M, Gran R, Granados E, Harris D A, Jena D, Jena S, Kleykamp J, Klustová A, Kordosky M, Last D, Le T, Lozano A, Lu X-G, Mahbub I, Maher E, Manly S, Mann W A, Mauger C, McFarland K S, Messerly B, Miller J, Moreno O, Morfín J G, Naples D, Nelson J K, Nguyen C, Olivier A, Paolone V, Perdue G N, Plows K-J, Ramírez M A, Ransome R D, Ray H, Ruterbories D, Schellman H, Solano Salinas C J, Su H, Sultana M, Syrotenko V S, Utt B, Valencia E, Vaughan N H, Waldron A V, Yaeggy B, Zazueta L

机构信息

Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.

Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

出版信息

Phys Rev Lett. 2023 Jul 7;131(1):011801. doi: 10.1103/PhysRevLett.131.011801.

DOI:10.1103/PhysRevLett.131.011801

PMID:37478458

Abstract

Neutrino-induced charged-current single π^{+} production in the Δ(1232) resonance region is of considerable interest to accelerator-based neutrino oscillation experiments. In this Letter, high statistic differential cross sections are reported for the semiexclusive reaction ν_{μ}A→μ^{-}π^{+}+ nucleon(s) on scintillator, carbon, water, iron, and lead targets recorded by MINERvA using a wideband ν_{μ} beam with ⟨E_{ν}⟩≈6 GeV. Suppression of the cross section at low Q^{2} and enhancement of low T_{π} are observed in both light and heavy nuclear targets compared with phenomenological models used in current neutrino interaction generators. The cross sections per nucleon for iron and lead compared with CH across the kinematic variables probed are 0.8 and 0.5 respectively, a scaling which is also not predicted by current generators.

摘要

在基于加速器的中微子振荡实验中，中微子诱发的带电流单π⁺在Δ(1232)共振区产生的过程备受关注。在本信函中，报告了使用MINERvA在闪烁体、碳、水、铁和铅靶上对半专属反应νₑA→μ⁻π⁺ + 核子进行的高统计微分截面测量结果，该实验使用了平均能量⟨Eₑ⟩≈6 GeV的宽带νₑ束。与当前中微子相互作用发生器中使用的唯象模型相比，在轻核和重核靶中均观察到低Q²处截面的抑制和低Tπ处的增强。在探测的运动学变量范围内，铁和铅相对于碳的每核子截面分别为0.8和0.5，这种标度关系也是当前发生器所未预测到的。