Fast way to determine pp-collision time at the SPD experiment

TL;DR

This paper presents a rapid and reliable method to determine the proton-proton collision time at the SPD experiment by using reconstructed particle tracks, achieving an uncertainty of about 30 ps and processing each event in under 300 ns.

Contribution

The paper introduces a novel fast method for collision time estimation using a specific subset of pions, improving speed and reliability over previous techniques.

Findings

Estimation uncertainty is approximately 30 ps.

Processing time per event is less than 300 ns.

Method is suitable for high flux input events.

Abstract

The main task of this work is to find a fast and robust way to determine pp-collision time t0 at the SPD experiment. Using physics motivations, from the input flux of reconstructed particles' tracks we identify a subset of pions which is used to calculate the unbiased estimation of the event collision time. The uncertainty of the estimation is about 30 ps. This method is fast (less than 300 ns per event) and reliable, thus it will allow to process the high flux of input events at the SPD experiment.