magistrsko delo
Lenart Jerala (Author), Jernej Kamenik (Mentor)

Abstract

Največja in hkrati ena izmed najslabše eksperimentalno določenih sklopitev standardnega modela osnovnih delcev in interakcij je tako imenovana Yukawina sklopitev med kvarkom t ter Higgsovim bozonom ($y_\mathrm{t}$). Znotraj standadnega modela je $y_\mathrm{t}$ tesno povezana z maso kvarka t, ta zveza pa je lahko kršena v razširitvah standardnega modela. V takih primerih lahko z upoštevanjem elektrošibke umeritvene invariance in metod efektivne teorije polja napovemo obstoj novega, še ne opaženega procesa — hkratne tvorbe parov Higgsovih bozonov ter kvarkov t in anti-t v hadronskih trkalnikih. Tema magistrskega dela je teoretična obravnava poglavitnih karakteristik tega procesa na velikem hadronskem trkalniku ter projekcija senzitivnosti na $y_\mathrm{t}$ s pomočjo analitičnih izračunov in simulacij Monte Carlo.

Keywords

fizika osnovnih delcev;standardni model;kvark top;Higgsov bozon;Yukawina sklopitev;efektivna teorija polja;Willsonov koeficient;formalizem kappa;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FMF - Faculty of Mathematics and Physics
Publisher: [L. Jerala]
UDC: 539.12
COBISS: 206670083 Link will open in a new window
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Other data

Secondary language: English
Secondary title: Production of Higgs bosons and top quark pairs at hadron colliders as tests of top Yukawa coupling
Secondary abstract: The largest and at the same time one of the least experimentally determined couplings of the standard model of elementary particles and interactions is the so-called Yukawa coupling between the top quark and the Higgs boson ($y_\mathrm{t}$). Within the standard model, $y_\mathrm{t}$ is closely related to the mass of the top quark, but this relationship can be violated in extensions of the standard model. In such cases, considering the electroweak gauge invariance and methods of effective field theory, we can predict the existence of a new, yet unobserved process — the simultaneous production of pairs of Higgs bosons and top and anti-top quarks in hadron colliders. The topic of this master's thesis is the theoretical examination of the main characteristics of this process at the Large Hadron Collider and the projection of sensitivity to $y_\mathrm{t}$ using analytical calculations and Monte Carlo simulations.
Secondary keywords: physics of elementary particles;standard model;top quark;Higgs boson;Yukawa coupling;effective field theory;Willson coefficient;kappa formalism;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za fiziko
Pages: 63 str.
ID: 24910783