Search for nucleon-nucleon correlations in neutrino-argon scattering

TL;DR

This paper investigates nucleon-nucleon correlations in neutrino-argon scattering using experimental data and Monte Carlo simulations, revealing discrepancies in laboratory frame correlations but good agreement in reconstructed data.

Contribution

It compares experimental and simulated nucleon pair data, highlighting the importance of reconstruction in analyzing nucleon correlations in neutrino interactions.

Findings

Discrepancy in laboratory frame back-to-back nucleon pairs between data and MC.

Good agreement between data and MC for reconstructed nucleon pairs.

Kinematical argument explains the observed agreement in reconstructed data.

Abstract

A sample of two proton and no pion events selected in the ArgoNeuT neutrino scattering experiment on liquid argon target [Phys. Rev. D90 (2014) 012008] is analyzed with NuWro Monte Carlo event generator. An attempt is made to estimate how likely it is to obtain observed numbers of laboratory frame and reconstructed back-to-back nucleon pairs. For laboratory frame back-to-back events a clear data/MC discrepancy is seen. For the reconstructed nucleon pairs a good agreement is reported. We provide a simple kinematical argument why this accordance is expected.