Speaker
Description
Energy Response Model for JUNO Experiment
Miao Yu, on behalf of JUNO collaboration
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment with 20000 ton liquid scintillator (LS) detector under civil construction. The primary physics goal for JUNO is to determine the neutrino mass ordering by precisely measuring the fine oscillation pattern of reactor neutrinos at around 53 km baseline. Antineutrinos emitted by nuclear reactors are detected by inverse beta decay (IBD) interaction $\bar\nu_e + p→ e^+ + n$ where the positron carries most fraction of neutrino energy. To precisely construct incoming neutrino energy spectrum, it’s vital to have a better understanding for positron energy response (e.g. nonlinearity and resolution) in LS. While the common calibration sources are almost gamma sources, it is required to develop a calibration-based energy response model for positrons with the help of calibration data. In this poster, a unified model to describe both nonlinearity and energy resolution is presented, and the effects from scintillation light and Cherenkov light are studied separately in detail. Also, possible disentanglement between scintillation and Cherenkov light contributions in energy response based on feasible external measurements are discussed for better model constraints.
