Upgrade of the ALICE Inner Tracking System

TL;DR

The ALICE experiment's Inner Tracking System upgrade significantly enhances data acquisition rate and vertex reconstruction precision, enabling new physics measurements in heavy-ion collision studies.

Contribution

This paper details the design, goals, and expected physics impact of the upgraded ALICE Inner Tracking System, which improves data rate and spatial resolution.

Findings

Data taking rate increased by nearly 100 times

Secondary vertex reconstruction precision improved by at least a factor of 3

Enables new physics measurements in heavy-ion collisions

Abstract

A Large Ion Collider Experiment (ALICE) is built to study the properties of the strongly interacting matter created in heavy-ion collisions at the LHC. With the upgrade of its Inner Tracking System (ITS), the ALICE experiment is going to increase the rate of data taking by almost two orders of magnitude. At the same time, the precision of secondary vertex reconstruction will become by at least a factor 3 better than it currently is. In this talk, we briefly show some selected physics results motivating the upgrade of the ITS, describe the design goals and the layout of the new detector, and highlight a few important measurements that will be realized after the completion of this upgrade.