Performances of a new generation tracking detector: the MEG II cylindrical drfit chamber

TL;DR

The MEG II cylindrical drift chamber, a novel single-volume design, significantly enhances resolution and efficiency for detecting low-energy positrons, boosting the experiment's sensitivity and setting a new standard for future collider detectors.

Contribution

This paper introduces the innovative single-volume cylindrical drift chamber design for MEG II, demonstrating improved performance over previous segmented chambers.

Findings

Higher resolution and efficiency in positron detection.

Enhanced sensitivity of the MEG II experiment.

Potential as a model for future collider tracking detectors.

Abstract

The cylindrical drift chamber is the most innovative part of the MEG~II detector, the upgraded version of the MEG experiment. The MEG~II chamber differs from the MEG one because it is a single volume cylindrical structure, instead of a segmented one, chosen to improve its resolutions and efficiency in detecting low energy positrons from muon decays at rest. In this paper, we show the characteristics and performances of this fundamental part of the MEG~II apparatus and we discuss the impact of its higher resolution and efficiency on the sensitivity of the MEG~II experiment. Because of its innovative structure and high quality resolution and efficiency the MEG~II cylindrical drift chamber will be a cornerstone in the development of an ideal tracking detector for future positron-electron collider machines.