arXiv 1409.38352014-09hep-exnucl-ex

从$1.5$到$20$ GeV的$E_ν$在碳上中微子和反中微子束中相干产生$π^\pm$的测量

Measurement of Coherent Production of $π^\pm$ in Neutrino and Anti-Neutrino Beams on Carbon from $E_ν$ of $1.5$ to $20$ GeV

A. Higuera, A. Mislivec, L. Aliaga, O. Altinok, A. Bercellie, M. Betancourt, A. Bodek, A. Bravar, W. K. Brooks, H. Budd, A. Butkevich, M. F. Carneiro, C. M. Cas… 展开作者

A. Higuera, A. Mislivec, L. Aliaga, O. Altinok, A. Bercellie, M. Betancourt, A. Bodek, A. Bravar, W. K. Brooks, H. Budd, A. Butkevich, M. F. Carneiro, C. M. Castromonte, M. E. Christy, J. Chvojka, H. da Motta, J. Devan, S. A. Dytman, G. A. Díaz, B. Eberly, J. Felix, L. Fields, R. Fine, G. A. Fiorentini, H. Gallagher, A. Gomez, R. Gran, D. A. Harris, K. Hurtado, J. Kleykamp, M. Kordosky, T. Le, E. Maher, S. Manly, W. A. Mann, C. M. Marshall, D. A. Martinez Caicedo, K. S. McFarland, C. L. McGivern, A. M. McGowan, B. Messerly, J. Miller, J. G. Morfín, J. Mousseau, T. Muhlbeier, D. Naples, J. K. Nelson, A. Norrick, J. Osta, J. L. Palomino, V. Paolone, J. Park, C. E. Patrick, G. N. Perdue, R. D. Ransome, H. Ray, L. Ren, P. A. Rodrigues, D. Ruterbories, H. Schellman, D. W. Schmitz, F. D. Snider, C. J. Solano Salinas, N. Tagg, B. G. Tice, E. Valencia, T. Walton, J. Wolcott, M. Wospakrik, G. Zavala, D. Zhang, B. P. Ziemer

备注：: 13 pages, 4 figures. v3->v4 corrections to several inline formulas and fixes to citations. v2->v3 revision includes minor corrections to text and tables, the final ArgoNeuT result in Figure 3, and ancillary files with the tables in CSV format. v1->v2 revision added comparisons to NEUT generator and updated estimate of the diffractive-like process on protons
发表信息：: Phys. Rev. Lett. 113, 261802 (2014)
DOI：: 10.1103/PhysRevLett.113.261802

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摘要：

中子诱导的核上相干带电π介子的产生，$\stackrel{(-)}ν_μA\toμ^\pmπ^\mp A$是一种罕见的非弹性相互作用，其中一个小的平方四动量$| t|$被转移到反冲核，使其在反应中保持完整。在MINERvA的闪烁体跟踪器中，我们从核分裂中去除了具有粒子证据的事件，并从末态π介子和μ介子重建了$| t|$。我们选择低$| t|$事件来分离富含相干候选物的样本。通过选择低$| t|$事件，我们产生了一个模型无关的测量微分截面的相干散射中微子和反中微子在碳上。我们发现在中微子发生器中使用的电流振荡实验的预测运动学的协议差。

英文摘要：

Neutrino-induced coherent charged pion production on nuclei, $\stackrel{(-)}ν_μA\toμ^\pmπ^\mp A$ is a rare, inelastic interaction in which a small squared four-momentum $| t|$ is transferred to the recoil nucleus leaving it intact in the reaction. In the scintillator tracker of MINERvA, we remove events with evidence of particles from nuclear breakup and reconstruct $| t|$ from the final state pion and muon. We select low $| t|$ events to isolate a sample rich in coherent candidates. By selecting low $| t|$ events we produce a model-independent measurement of the differential cross section for coherent scattering of neutrinos and anti-neutrinos on carbon. We find poor agreement with the predicted kinematics in neutrino generators used by current oscillation experiments.

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