Maximum likelihood reconstruction for the Daya Bay Experiment

15th International Workshop on Advanced Computing and Analysis Techniques in Physics Research

物理学;计算机科学

Xia, Dongmei^1

Institute of High Energy Physics, Beijing, 100049, China^1

关键词: Energy reconstruction;    Maximum likelihood methods;    Maximum-likelihood reconstruction;    Neutrino detectors;    Neutrino experiments;    Optimized parameter;    Radial direction;    Vertex reconstruction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/523/1/012025/pdf
DOI  :  10.1088/1742-6596/523/1/012025

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The Daya Bay reactor neutrino experiment is designed to precisely determine the neutrino mixing angle θ13. In this paper, we present an algorithm using the maximum likelihood (ML) method to reconstruct the vertex and energy of events in the anti-neutrino detector, based on a simplified optical model describing light propagation. The key parameters of the optical model are calibrated with60Co source, by comparing the predicted charges of the PMTs with the observed charges. With the optimized parameters, the ML reconstruction provides a uniform energy reconstruction, and a vertex reconstruction with small bias along radial direction.