用中微子诱导的充电中性锥子产生探测核效应

论文标题

用中微子诱导的充电中性锥子产生探测核效应

Probing nuclear effects with neutrino-induced charged-current neutral pion production

论文作者

Coplowe, D., Altinok, O., Dar, Z. Ahmad, Akbar, F., Andrade, D. A., Barr, G. D., Bashyal, A., Bercellie, A., Betancourt, M., Bodek, A., Bravar, A., Budd, H., Caceres, G., Cai, T., Carneiro, M. F., da Motta, H., Dytman, S. A., Díaz, G. A., Felix, J., Fields, L., Filkins, A., Fine, R., Gago, A. M., Gallagher, H., Ghosh, A., Gran, R., Harris, D. A., Henry, S., Jena, S., Kleykamp, J., Kordosky, M., Last, D., Le, T., Lozano, A., Lu, X. -G., Maher, E., Manly, S., Mann, W. A., Mauger, C., McFarland, K. S., Messerly, B., Miller, J., Morfín, J. G., Naples, D., Nelson, J. K., Nguyen, C., Norrick, A., Olivier, A., Paolone, V., Perdue, G. N., Ramírez, M. A., Ransome, R. D., Ray, H., Rodrigues, P. A., Ruterbories, D., Schellman, H., Sobczyk, J. T., Salinas, C. J. Solano, Su, H., Sultana, M., Syrotenko, V. S., Valencia, E., Wark, D., Weber, A., Wospakrik, M., Wret, C., Yaeggy, B., Zazueta, L.

论文摘要

我们使用具有完全成像的最终状态质子$π^0 $系统的事件研究中微子诱导的带电电流（CC）$π^0 $生产。基于横向运动学不平衡的最终状态相关性的新型使用能够对核子的费米运动，核内动量转移（IMT）动力学以及最终中微子pion pion产生中最终态耐足的耐药性动量构型进行首次测量。提出了事件分布的i）i）在费米表面以下中微子struck中子的动量，ii）缺失横向动量表征IMT强度的方向，以及相对于Lepton散射平面的质子pion-pion动量不平衡。将观察到的费米运动和IMT强度与以前的中微子CC隔层样产生的Minerva测量进行了比较。这些分布的测量形状和绝对速率以及横截面不对称显示出与当前中微子发生器模型的预测的紧张关系。

We study neutrino-induced charged-current (CC) $π^0$ production on carbon nuclei using events with fully imaged final-state proton-$π^0$ systems. Novel use of final-state correlations based on transverse kinematic imbalance enable the first measurements of the struck nucleon's Fermi motion, of the intranuclear momentum transfer (IMT) dynamics, and of the final-state hadronic momentum configuration in neutrino pion production. Event distributions are presented for i) the momenta of neutrino-struck neutrons below the Fermi surface, ii) the direction of missing transverse momentum characterizing the strength of IMT, and iii) proton-pion momentum imbalance with respect to the lepton scattering plane. The observed Fermi motion and IMT strength are compared to the previous MINERvA measurement of neutrino CC quasielastic-like production. The measured shapes and absolute rates of these distributions, as well as the cross-section asymmetries show tensions with predictions from current neutrino generator models.

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