Top-Quark Pair Production Cross Sections and Calibration of the Top-Quark Monte-Carlo Mass

Measurements Performed with the CMS Detector Using LHC Run I Proton-Proton Collision Data
Softcover Nachdruck of the original 1. Auflage 2016
ISBN: 978-3-319-82012-5
Verlag: Springer International Publishing

Buch, Englisch, 167 Seiten, Paperback, Format (B × H): 155 mm x 235 mm, Gewicht: 2876 g

Reihe: Springer Theses

This thesis presents the first experimental calibration of the top-quark Monte-Carlo mass.  It also provides the top-quark mass-independent and most precise top-quark pair production cross-section measurement to date. The most precise measurements of the top-quark mass obtain the top-quark mass parameter (Monte-Carlo mass) used in simulations, which are partially based on heuristic models. Its interpretation in terms of mass parameters used in theoretical calculations, e.g. a running or a pole mass, has been a long-standing open problem with far-reaching implications beyond particle physics, even affecting conclusions on the stability of the vacuum state of our universe.
In this thesis, this problem is solved experimentally in three steps using data obtained with the compact muon solenoid (CMS) detector. The most precise top-quark pair production cross-section measurements to date are performed. The Monte-Carlo mass is determined and a new method forextracting the top-quark mass from theoretical calculations is presented. Lastly, the top-quark production cross-sections are obtained – for the first time – without residual dependence on the top-quark mass, are interpreted using theoretical calculations to determine the top-quark running- and pole mass with unprecedented precision, and are fully consistently compared with the simultaneously obtained top-quark Monte-Carlo mass.

Zielgruppe

Research

Autoren/Hrsg.

Kieseler, Jan

Fachgebiete

• Naturwissenschaften Physik Quantenphysik Teilchenphysik

Inhaltsverzeichnis

Introduction.- Top Quark Production and Decay in Proton-Proton Collisions.- The LHC and the CMS Experiment.- Event Reconstruction and Selection.- Measurement of the Top-Quark Pair Production Cross Section.- Extraction of the Top-Quark Mass.- Calibration of the Top-Quark Monte-Carlo Mass.- Summary and Conclusions.