Neutrino-Induced Coherent π+ Production in C, CH, Fe, and Pb at ⟨Eν ©∼6 GeV

Ramírez M.A.; Akhter S.; Ahmad Dar Z.; Akbar F.; Ansari V.; Ascencio M.V.; Sajjad Athar M.; 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. · Physical Review Letters (2023) · DOI: 10.1103/physrevlett.131.051801

Resumen

MINERvA has measured the νμ-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 νμ energies and at produced π+ energies and angles, Eπ>1 GeV and θπ<10°. Measurements of the cross-section ratios of Fe and Pb relative to CH reveal the effective A scaling to increase from an approximate A1/3 scaling at few GeV to an A2/3 scaling for Eν>10 GeV.

Instituciones: Pontificia Universidad Católica del Perú