# Application of SNiPER framework to BESIII physics analysis

## TL;DR

This paper presents a new SNiPER-based framework for BESIII physics analysis, significantly improving data processing speed through a redesigned event data model and lazy-loading techniques, demonstrated with a real physics analysis.

## Contribution

The paper introduces a SNiPER-based analysis framework with a novel reconstructed event data model and SmartRef lazy-loading, enhancing processing efficiency for BESIII data.

## Key findings

- Achieved a 10.3-fold speedup in Input/Output operations.
- Demonstrated the framework with a real physics analysis of e+e- to pi+pi-J/psi.
- Identified the data model and SmartRef lazy-loading as key to performance gains.

## Abstract

A fast physics analysis framework has been developed based on SNiPER to process the increasingly large data sample collected by BESIII. In this framework, a reconstructed event data model with SmartRef is designed to improve the speed of Input/Output operations, and necessary physics analysis tools are migrated from BOSS to SNiPER. A real physics analysis $e^{+}e^{-} \rightarrow \pi^{+}\pi^{-}J/\psi$ is used to test the new framework, and achieves a factor of 10.3 improvement in Input/Output speed compared to BOSS. Further tests show that the improvement is mainly attributed to the new reconstructed event data model and the lazy-loading functionality provided by SmartRef.