Momentum Resolution Improvement Technique for Silicon Tracking Detectors using dE/dx

TL;DR

This paper presents a novel technique that uses dE/dx measurements and the Bethe-Bloch formula to double the momentum resolution for low momentum particles in silicon trackers, enhancing heavy ion experiment accuracy.

Contribution

The paper introduces a new method leveraging dE/dx and Bethe-Bloch calculations to significantly improve momentum resolution in silicon tracking detectors.

Findings

Achieved a twofold improvement in momentum resolution.

Effective for low momentum particles in heavy ion experiments.

Applicable to silicon trackers with few layers.

Abstract

A technique for improving the momentum resolution for low momentum charged particles in few layer silicon based trackers is presented. The particle momenta are determined from the measured Landau dE/dx distribution and the Bethe-Bloch formula in the 1/beta^2 region. It is shown that a factor of two improvement of the momentum determination is achieved as compared to standard track fitting methods. This improvement is important in large scale heavy ion experiments which cover the low transverse momentum spectra using stand-alone silicon tracking devices with a few planes like the ones used in STAR at RHIC and ALICE at LHC.