The Concurrent Track Evolution Algorithm: Extension for Track Finding in the Inhomogeneous Magnetic Field of the HERA-B Spectrometer

TL;DR

This paper extends the Concurrent Track Evolution algorithm to handle three-dimensional propagation in inhomogeneous magnetic fields, demonstrating its effectiveness on HERA-B Monte Carlo data with realistic detector simulations.

Contribution

The paper introduces an extension of the Concurrent Track Evolution method for 3D propagation in inhomogeneous magnetic fields, tailored for forward spectrometers like HERA-B.

Findings

Effective track finding in inhomogeneous magnetic fields demonstrated

Method achieves fast transport in complex magnetic environments

Validated on realistic Monte Carlo simulations

Abstract

The Concurrent Track Evolution method, which was introduced in a previous paper (DESY 97-054), has been further explored by applying it to the propagation of track candidates into an inhomogeneous magnetic field volume equipped with tracking detectors, as is typical for forward B spectrometers like HERA-B or LHCb. Compared to the field-free case, the method was extended to three-dimensional propagation, with special measures necessary to achieve fast transport in the presence of a fast-varying magnetic field. The performance of the method is tested on HERA-B Monte Carlo events with full detector simulation and a realistic spectrometer geometry.