Measurement of Neutral Current Coherent $\pi^0$ Production In The NOvA Near Detector

TL;DR

This paper reports the measurement of neutral current coherent π^0 production in the NOvA Near Detector, providing insights into neutrino-nucleus interactions crucial for neutrino oscillation studies.

Contribution

It presents one of the first measurements of neutral current coherent π^0 production at NOvA, including kinematics, cross-section, and background constraints.

Findings

Measured coherent π^0 cross-section and kinematics

Developed a data-driven background constraint method

Compared results with theoretical model predictions

Abstract

The NOvA experiment is a long-baseline neutrino oscillation experiment designed to measure electron neutrino appearance in a muon neutrino beam. It consists of two finely segmented, liquid scintillator detectors at 14 mrad off-axis in the NuMI beam.The NOvA Near Detector, located at Fermilab, provides an excellent opportunity to study neutrino-nucleus interactions which are important for the neutrino oscillation measurements. This talk will present one of the first such measurements from the NOvA Near Detector: neutral current coherent-$\pi^0$ production. Neutrinos can coherently interact with the target nucleus via neutral current exchange and produce a single, forward $\pi^0$, which is a background to the $\nu_e$ appearance measurement. This analysis measures the coherent- $\pi^0$ kinematics and cross-section and compares it to the model predictions. A data-driven method is developed to constrain the neutral current resonance and deep-inelastic $\pi^0$ productions which are background to this analysis.