Measurement of the muon antineutrino double-differential cross section for quasielastic-like scattering on hydrocarbon at E-v similar to 3.5 GeV

C. E. Patrick
L. Aliaga
A. Bashyal
L. Bellantoni
A. Bercellie
M. Betancourt
A. Bodek
A. Bravar
H. Budd
G. F. R. Caceres
M. F. Carneiro
E. Chavarria
H. da Motta
S. A. Dytman
G. A. Diaz
J. Felix
L. Fields
R. Fine
A. M. Gago
R. Galindo
H. Gallagher
A. Ghosh
R. Gran
J. Y. Han
D. A. Harris

Abstract

We present double-differential measurements of antineutrino charged-current quasielastic scattering in the MINERvA detector. This study improves on a previous single-differential measurement by using updated reconstruction algorithms and interaction models and provides a complete description of observed muon kinematics in the form of a double-differential cross section with respect to muon transverse and longitudinal momentum. We include in our signal definition zero-meson final states arising from multinucleon interactions and from resonant pion production followed by pion absorption in the primary nucleus. We find that model agreement is considerably improved by a model tuned to MINERvA inclusive neutrino scattering data that incorporates nuclear effects such as weak nuclear screening and two-particle, two-hole enhancements.