Study of the CMS Phase-1 Pixel Pilot Blade Reconstruction

TL;DR

This paper presents the reconstruction and analysis of data from upgraded CMS pixel detector modules, demonstrating their performance and calibration to improve particle tracking in high-energy physics experiments.

Contribution

It introduces the reconstruction and calibration procedures for the CMS Phase-1 pixel pilot blades, providing operational insights into the upgraded detector modules.

Findings

High hit finding efficiency achieved

Residual distributions indicate precise tracking

Successful calibration of reconstruction software

Abstract

The Compact Muon Solenoid (CMS) detector is one of two general-purpose detectors that measure the products of high energy particle interactions in the Large Hadron Collider (LHC) at CERN. The silicon pixel detector is the innermost component of the CMS tracking system. The detector which was in operation between 2009 and 2016 has now been replaced with an upgraded one in the beginning of 2017. During the previous shutdown period of the LHC, a prototype readout system and a third disk was inserted into the old forward pixel detector with eight prototype blades constructed using the new digital read-out chips. Testing the performance of these pilot modules enabled us to gain operational experience with the upgraded detector. In this paper, the reconstruction and analysis of the data taken with the new modules are presented including information on the calibration of the reconstruction software. The hit finding efficiency and track-hit residual distributions are also shown.