中微子与碳氢化合物相互作用中来自氢的中性流衍射中性π介子产生的证据
高能物理 - 实验
2016-09-14 v5 仪器与探测器
摘要
MINERvA 实验在平均束流能量为 4.5 GeV 的碳氢化合物靶上的中性流中微子相互作用中，观察到包含电磁簇射的事件数超出蒙特卡洛模拟的预期。该超出被表征，并发现与中性流中性 π 介子产生一致，其具有峰值在 7 GeV 的宽能量分布和总截面 。超出的角分布、电磁簇射能量和能量沉积的空间分布与碳氢化合物靶中来自氢的中微子中性流衍射中性 π 介子产生的预期一致。这些数据构成了对该反应的首个直接实验观测和约束，该反应在寻找 μ 中微子到电子中微子振荡的中微子振荡实验中是一个重要的背景过程。
引用
@article{arxiv.1604.01728,
title = {Evidence for neutral-current diffractive neutral pion production from hydrogen in neutrino interactions on hydrocarbon},
author = {MINERvA Collaboration and J. Wolcott and L. Aliaga and O. Altinok and A. Bercellie and M. Betancourt and A. Bodek and A. Bravar and H. Budd and T. Cai and M. F. Carneiro and J. Chvojka and H. da Motta and J. Devan and S. A. Dytman and G. A. Díaz and B. Eberly and E. Endress and J. Felix and L. Fields and R. Fine and R. Galindo and H. Gallagher and T. Golan and R. Gran and D. A. Harris and A. Higuera and K. Hurtado and M. Kiveni and J. Kleykamp and M. Kordosky and T. Le and E. Maher and S. Manly and W. A. Mann and C. M. Marshall and D. A. Martinez Caicedo and K. S. McFarland and C. L. McGivern and A. M. McGowan and B. Messerly and J. Miller and A. Mislivec and J. G. Morfín and J. Mousseau and D. Naples and J. K. Nelson and A. Norrick and Nuruzzaman and J. Osta and V. Paolone and J. Park and C. E. Patrick and G. N. Perdue and L. Rakotondravohitra and M. A. Ramirez and H. Ray and L. Ren and D. Rimal and P. A. Rodrigues and D. Ruterbories and H. Schellman and D. W. Schmitz and C. J. Solano Salinas and S. Sánchez Falero and N. Tagg and B. G. Tice and E. Valencia and T. Walton and M. Wospakrik and D. Zhang},
journal= {arXiv preprint arXiv:1604.01728},
year = {2016}
}
备注
15 pages, 7 figures; accepted by Phys. Rev. Lett