中微子引起的连贯$π^{+} $在$ \ langlee_ν\ rangle \ sim 6 $ gev中c，ch，fe和pb中的生产

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中微子引起的连贯$π^{+} $在$ \ langlee_ν\ rangle \ sim 6 $ gev中c，ch，fe和pb中的生产

Neutrino-induced coherent $π^{+}$ production in C, CH, Fe and Pb at $\langle E_ν\rangle \sim 6$ GeV

论文作者

Ramírez, M. A., Akhter, S., Dar, Z. Ahmad, Akbar, F., Ansari, V., Ascencio, M. V., Athar, M. Sajjad, Bashyal, A., Bellantoni, L., Bercellie, A., 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., Gallagher, H., Ghosh, A., Gilligan, S. M., Gran, R., Granados, E., Harris, D. A., Henry, S., Jena, D., Jena, S., Kleykamp, J., Klustová, A., Kordosky, M., Last, D., Lozano, A., Lu, X. -G., 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., Ransome, R. D., Ruterbories, D., Schellman, H., Su, H., Sultana, M., Syrotenko, V. S., Valencia, E., Vaughan, N. H., Waldron, A. V., Yaeggy, B., Zazueta, L.

论文摘要

密涅瓦（Minerva）在使用2至20 GEV的中微子中，同时测量了$ν_μ$诱导的相干$π^{+} $横截面，同时使用碳氢化合物（CH），石墨（C），铁（Fe）和铅（PB）目标。这些测量值超过了基于多gev $ν_μ$ energies的Rein-Sehgal和Berger-Sehgal PCAC的预测，并在产生的$π^{+} $ enguils and Angles，$e_π> 1 $ GEV和$θ_π<10^{\ 10^{\ circ} $。相对于CH相对于CH的Fe和Pb的横截面比的测量表明，有效的$ A $尺度是从几个GEV的大约$ a^{1/3} $缩放到$ a^{2/3} $缩放的$e_ν> 10 $ GEV的增加。

MINERvA has measured the $ν_μ$-induced coherent $π^{+}$ cross section simultaneously in hydrocarbon (CH), graphite (C), iron (Fe) and lead (Pb) targets using neutrinos from 2 to 20 GeV. The measurements exceed the predictions of the Rein-Sehgal and Berger-Sehgal PCAC based models at multi-GeV $ν_μ$ energies and at produced $π^{+}$ energies and angles, $E_π>1$ GeV and $θ_π<10^{\circ}$. Measurements of the cross-section ratios of Fe and Pb relative to CH reveal the effective $A$-scaling to increase from an approximate $A^{1/3}$ scaling at few GeV to an $A^{2/3}$ scaling for $E_ν>10$ GeV.

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