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CMS Pixel Detector Upgrade and Top Quark Pole Mass Determination: Springer Theses

Autor Simon Spannagel
en Limba Engleză Hardback – 9 aug 2017
This thesis addresses two different topics, both vital for implementing modern high-energy physics experiments: detector development and data analysis. Providing a concise introduction to both the standard model of particle physics and the basic principles of semiconductor tracking detectors, it presents the first measurement of the top quark pole mass from the differential cross-section of tt+J events in the dileptonic tt decay channel.

The first part focuses on the development and characterization of silicon pixel detectors. To account for the expected increase in luminosity of the Large Hadron Collider (LHC), the pixel detector of the compact muon solenoid (CMS) experiment is replaced by an upgraded detector with new front-end electronics. It presents comprehensive test beam studies conducted to verify the design and quantify the performance of the new front-end in terms of tracking efficiency and spatial resolution. Furthermore, it proposes a new cluster interpol
ation method, which utilizes the third central moment of the cluster charge distribution to improve the position resolution.

The second part of the thesis introduces an alternative measurement of the top quark mass from the normalized differential production cross-sections of dileptonic top quark pair events with an additional jet. The energy measurement is 8TeV. Using theoretical predictions at next-to-leading order in perturbative Quantum Chromodynamics (QCD), the top quark pole mass is determined using a template fit method.

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Specificații

ISBN-13: 9783319588797
ISBN-10: 3319588796
Pagini: 274
Ilustrații: XXVII, 274 p. 136 illus., 74 illus. in color.
Dimensiuni: 155 x 235 mm
Greutate: 0.6 kg
Ediția:1st ed. 2017
Editura: Springer International Publishing
Colecția Springer
Seria Springer Theses

Locul publicării:Cham, Switzerland

Cuprins

Introduction to Particle Physics at Hadron Colliders.- The CMS Experiment at the LHC.- Basic Concepts of Semiconductor Tracking Detectors.- The CMS Pixel Detector for Phase I.- Simulation of CMS Pixel Detector Modules.- The pixar Data Acquisition and Calibration Framework.-  Test Beams at the DESY-II Synchrotron.- Qualification of the Phase I Readout Chip.- Improving the Position Resolution Using the Cluster Skewness.- Introduction to Top Quark Physics and the Measurement.- Simulation of Collision Events.- Object Reconstruction and Event Selection.- Systematic Uncertainties.- Measurement of the Top Quark Mass from the ρS Distribution of tt+jet Events.- Measurement of the Top Quark Mass from Differential tt+jet Cross Sections.- Summary and Prospects.

Textul de pe ultima copertă

This thesis addresses two different topics, both vital for implementing modern high-energy physics experiments: detector development and data analysis. Providing a concise introduction to both the standard model of particle physics and the basic principles of semiconductor tracking detectors, it presents the first measurement of the top quark pole mass from the differential cross-section of tt+J events in the dileptonic tt decay channel.

The first part focuses on the development and characterization of silicon pixel detectors. To account for the expected increase in luminosity of the Large Hadron Collider (LHC), the pixel detector of the compact muon solenoid (CMS) experiment is replaced by an upgraded detector with new front-end electronics. It presents comprehensive test beam studies conducted to verify the design and quantify the performance of the new front-end in terms of tracking efficiency and spatial resolution. Furthermore, it proposes a new cluster interpol
ation method, which utilizes the third central moment of the cluster charge distribution to improve the position resolution.

The second part of the thesis introduces an alternative measurement of the top quark mass from the normalized differential production cross-sections of dileptonic top quark pair events with an additional jet. The energy measurement is 8TeV. Using theoretical predictions at next-to-leading order in perturbative Quantum Chromodynamics (QCD), the top quark pole mass is determined using a template fit method.



Caracteristici

Nominated as an outstanding PhD thesis by DESY, Hamburg, Germany Provides a concise introduction to both the standard model of particle physics and the basic principles of semiconductor tracking detectors Offers a detailed description of the qualification of the new compact muon solenoid (CMS) pixel detector Introduces a novel method of cluster center interpolation for solid-state tracking detectors Includes supplementary material: sn.pub/extras