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First differential measurements of tZq production and luminosity determination using Z boson rates at the LHC

Record Type:	Electronic resources : Monograph/item
Title/Author:	First differential measurements of tZq production and luminosity determination using Z boson rates at the LHCby David Walter.
Author:	Walter, David.
Published:	Cham :Springer Nature Switzerland :2024.
Description:	xv, 194 p. :ill. (some col.), digital ;24 cm.
Notes:	"Doctoral thesis accepted by University of Hamburg, Hamburg, Germany."
Contained By:	Springer Nature eBook
Subject:	Z bosons.
Online resource:	https://doi.org/10.1007/978-3-031-50931-5
ISBN:	9783031509315$q(electronic bk.)

First differential measurements of tZq production and luminosity determination using Z boson rates at the LHC
Walter, David.

First differential measurements of tZq production and luminosity determination using Z boson rates at the LHC[electronic resource] /by David Walter. - Cham :Springer Nature Switzerland :2024. - xv, 194 p. :ill. (some col.), digital ;24 cm. - Springer theses,2190-5061. - Springer theses..

"Doctoral thesis accepted by University of Hamburg, Hamburg, Germany."

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.

ISBN: 9783031509315$q(electronic bk.)

Standard No.: 10.1007/978-3-031-50931-5doiSubjects--Topical Terms:

567616
Z bosons.

LC Class. No.: QC793.5.B62

Dewey Class. No.: 539.721

First differential measurements of tZq production and luminosity determination using Z boson rates at the LHC
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520 $a 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.
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