Probing nuclear effects with neutrino-induced charged-current neutral pion production

D. Coplowe; O. Altinok; Z. Ahmad Dar; F. Akbar; D. A. Andrade; G. D. Barr; A. Bashyal; A. Bercellie; M. Betancourt; A. Bodek; A. Bravar; H. Budd; G. Caceres; T. Cai; M. F. Carneiro; H. da Motta; S. A. Dytman; G. A. Díaz; J. Felix; L. Fields; A. Filkins; R. Fine; A. M. Gago; H. Gallagher; A. Ghosh; R. Gran; D. A. Harris; S. Henry; S. Jena; J. Kleykamp; M. Kordosky; D. Last; T. Le; A. Lozano; X. -G. Lu; E. Maher; S. Manly; W. A. Mann; C. Mauger; K. S. McFarland; B. Messerly; J. Miller; J. G. Morfín; D. Naples; J. K. Nelson; C. Nguyen; A. Norrick; A. Olivier; V. Paolone; G. N. Perdue; M. A. Ramírez; R. D. Ransome; H. Ray; P. A. Rodrigues; D. Ruterbories; H. Schellman; J. T. Sobczyk; C. J. Solano Salinas; H. Su; M. Sultana; V. S. Syrotenko; E. Valencia; D. Wark; A. Weber; M. Wospakrik; C. Wret; B. Yaeggy; L. Zazueta

doi:10.1103/physrevd.102.072007

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arXiv · 2002.05812

Probing nuclear effects with neutrino-induced charged-current neutral pion production

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Abstract

We study neutrino-induced charged-current (CC) $\pi^0$ production on carbon nuclei using events with fully imaged final-state proton-$\pi^0$ systems. Novel use of final-state correlations based on transverse kinematic imbalance enable the first measurements of the struck nucleon's Fermi motion, of the intranuclear momentum transfer (IMT) dynamics, and of the final-state hadronic momentum configuration in neutrino pion production. Event distributions are presented for i) the momenta of neutrino-struck neutrons below the Fermi surface, ii) the direction of missing transverse momentum characterizing the strength of IMT, and iii) proton-pion momentum imbalance with respect to the lepton scattering plane. The observed Fermi motion and IMT strength are compared to the previous MINERvA measurement of neutrino CC quasielastic-like production. The measured shapes and absolute rates of these distributions, as well as the cross-section asymmetries show tensions with predictions from current neutrino generator models.

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D. Coplowe, O. Altinok, Z. Ahmad Dar, F. Akbar, D. A. Andrade, G. D. Barr, A. Bashyal, A. Bercellie, M. Betancourt, A. Bodek, A. Bravar, H. Budd, G. Caceres, T. Cai, M. F. Carneiro, H. da Motta, S. A. Dytman, G. A. Díaz, J. Felix, L. Fields, A. Filkins, R. Fine, A. M. Gago, H. Gallagher, A. Ghosh, R. Gran, D. A. Harris, S. Henry, S. Jena, J. Kleykamp, M. Kordosky, D. Last, T. Le, A. Lozano, X. -G. Lu, E. Maher, S. Manly, W. A. Mann, C. Mauger, K. S. McFarland, B. Messerly, J. Miller, J. G. Morfín, D. Naples, J. K. Nelson, C. Nguyen, A. Norrick, A. Olivier, V. Paolone, G. N. Perdue, M. A. Ramírez, R. D. Ransome, H. Ray, P. A. Rodrigues, D. Ruterbories, H. Schellman, J. T. Sobczyk, C. J. Solano Salinas, H. Su, M. Sultana, V. S. Syrotenko, E. Valencia, D. Wark, A. Weber, M. Wospakrik, C. Wret, B. Yaeggy, L. Zazueta. 2020-02-13. Probing nuclear effects with neutrino-induced charged-current neutral pion production. https://doi.org/10.1103/physrevd.102.072007

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