A High-performance Track Fitter for Use in Ultra-fast Electronics

TL;DR

This paper introduces a high-speed, FPGA-implementable track fitting algorithm for particle detectors, enabling rapid and accurate track reconstruction suitable for real-time physics experiments.

Contribution

A novel linearized track fitting method optimized for FPGA implementation, providing fast and precise track parameters in high-energy physics applications.

Findings

Achieves high throughput in FPGA-based track fitting

Provides linear dependence of track parameters on hit positions

Demonstrates effectiveness with CMS detector geometry

Abstract

This article describes a new charged-particle track fitting algorithm designed for use in high-speed electronics applications such as hardware-based triggers in high-energy physics experiments. Following a novel technique designed for fast electronics, the positions of the hits on the detector are transformed before being passed to a linearized track parameter fit. This transformation results in fitted track parameters with a very linear dependence on the hit positions. The approach is demonstrated in a representative detector geometry based on the CMS detector at the Large Hadron Collider. The fit is implemented in FPGA chips and optimized for track fitting throughput and obtains excellent track parameter performance. Such an algorithm is potentially useful in any high-speed track-fitting application.