03504nam a22005535i 4500 978-3-031-50931-5 DE-He213 20251030111424.0 cr nn 008mamaa 240212s2024 sz | s |||| 0|eng d 9783031509315 978-3-031-50931-5 10.1007/978-3-031-50931-5 doi QC793-793.5 PHP bicssc SCI051000 bisacsh PHP thema Walter, David. author. aut http://id.loc.gov/vocabulary/relators/aut 70919 First Differential Measurements of tZq Production and Luminosity Determination Using Z Boson Rates at the LHC [electronic resource] / by David Walter. 1st ed. 2024. Cham : Springer Nature Switzerland : Imprint: Springer, 2024. XV, 194 p. 102 illus., 89 illus. in color. online resource. text txt rdacontent computer c rdamedia online resource cr rdacarrier text file PDF rda Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5061 Introduction -- Theoretical Foundations of Single Top Quark Physics at the LHC -- The CMS Experiment at the LHC -- Luminosity Determination Using Z Boson Production -- Measurements of Single Top Quark Production in Association With a Z Boson. Summary and conclusions. This thesis describes two groundbreaking measurements in the precision frontier at the LHC: the first ever differential measurement of the Z-associated single top quark (tZq) production, and the luminosity measurement using Z boson production rate for the first time in CMS. Observed only in 2018, the tZq process is of great importance in probing top quark electroweak couplings. These couplings are natural places for new phenomena to happen in the top quark sector of the standard model. Yet, they are the least explored directly. One has to obtain a firm understanding of the modeling of sensitive distributions to new top-Z interactions. The present analysis marks a major milestone in this long-term effort. All distributions relevant for new phenomena, and/or modeling of tZq, are studied in full depth using advanced Machine Learning techniques.The luminosity and its uncertainty contributes to every physics result of the experiment. The method minutely developed in this thesis provides a complementary measurement that results in a significant overall reduction of uncertainties. Particles (Nuclear physics). 68036 Mathematical physics. Measurement. 67386 Measuring instruments. 67387 Particle Physics. 68039 Theoretical, Mathematical and Computational Physics. 65563 Measurement Science and Instrumentation. 67389 SpringerLink (Online service) Springer Nature eBook Printed edition: 9783031509308 Printed edition: 9783031509322 Printed edition: 9783031509339 Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5061 66370 https://doi.org/10.1007/978-3-031-50931-5 ZDB-2-PHA ZDB-2-SXP 57592 57592