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arxiv: 2210.01285 · v2 · pith:2JGQP7DRnew · submitted 2022-10-04 · ✦ hep-ex

Neutrino-induced coherent π⁺ production in C, CH, Fe and Pb at langle E_(ν)rangle sim 6 GeV

M.A. Ram\'irez , S. Akhter , Z. Ahmad Dar , F. Akbar , V. Ansari , M. V. Ascencio , M. Sajjad Athar , A. Bashyal
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L. Bellantoni A. Bercellie M. Betancourt A. Bodek J. L. Bonilla A. Bravar H. Budd G. Caceres T. Cai G.A. D\'iaz H. da Motta S.A. Dytman J. Felix L. Fields A. Filkins R. Fine H. Gallagher A. Ghosh S.M. Gilligan R. Gran E. Granados D.A. Harris S. Henry D. Jena S. Jena J. Kleykamp A. Klustov\'a M. Kordosky D. Last A. Lozano X.-G. Lu E. Maher S. Manly W.A. Mann C. Mauger K.S. McFarland B. Messerly J. Miller O. Moreno J.G. Morf\'in D. Naples J.K. Nelson C. Nguyen A. Olivier V. Paolone G.N. Perdue K.-J. Plows R.D. Ransome D. Ruterbories H. Schellman H. Su M. Sultana V.S. Syrotenko E. Valencia N.H. Vaughan A.V. Waldron B. Yaeggy L. Zazueta (the MINERvA collaboration)
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classification ✦ hep-ex
keywords scalingcoherentenergiesmeasurementsanglesapproximateberger-sehgalcirc
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MINERvA has measured the $\nu_{\mu}$-induced coherent $\pi^{+}$ 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 $\nu_{\mu}$ energies and at produced $\pi^{+}$ energies and angles, $E_{\pi}>1$ GeV and $\theta_{\pi}<10^{\circ}$. 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 $E_{\nu}>10$ GeV.

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