First Measurement of Differential Charged Current Quasielasticlike ν μ -Argon Scattering Cross Sections with the MicroBooNE Detector

Le résumé fourni par la source

We report on the first measurement of flux-integrated single differential cross sections for charged-current (CC) muon neutrino (${\ensuremath{\nu}}_{\ensuremath{\mu}}$) scattering on argon with a muon and a proton in the final state, $^{40}\mathrm{Ar}$ $({\ensuremath{\nu}}_{\ensuremath{\mu}},\ensuremath{\mu}p)X$. The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of $4.59\ifmmode\times\else\texttimes\fi{}{10}^{19}$ protons on target. Events are selected to enhance the contribution of CC quasielastic (CCQE) interactions. The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics. We measure the integrated per-nucleus CCQE-like cross section (i.e., for interactions leading to a muon, one proton, and no pions above detection threshold) of $(4.93\ifmmode\pm\else\textpm\fi{}0.7{6}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}1.2{9}_{\mathrm{sys}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}38}\text{ }\text{ }{\mathrm{cm}}^{2}$, in good agreement with theoretical calculations. The single differential cross sections are also in overall good agreement with theoretical predictions, except at very forward muon scattering angles that correspond to low-momentum-transfer events.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.