在平均中微子能量约6 GeV下C、CH、Fe和Pb中中微子诱导的相干π⁺产生
Neutrino-induced coherent $π^{+}$ production in C, CH, Fe and Pb at $\langle E_ν\rangle \sim 6$ GeV
AI总结：
MINERvA在多种核靶上测量2–20 GeV中微子相干π⁺产生，发现截面高于现有PCAC模型，并揭示核质量数标度随能量由A^(1/3)转向A^(2/3)。
摘要：
MINERvA利用2至20 GeV的中微子，同时测量了碳氢化合物（CH）、石墨（C）、铁（Fe）和铅（Pb）靶中νμ诱导的相干π⁺截面。在多GeV νμ能量以及产生π⁺的能量和角度满足Eπ>1 GeV、θπ<10°时，测量结果高于基于PCAC的Rein-Sehgal和Berger-Sehgal模型预测。Fe和Pb相对于CH的截面比值测量表明，有效A标度从少数GeV时近似的A^(1/3)标度增强为Eν>10 GeV时的A^(2/3)标度。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
