AHA-BUCH

Theoretical and Experimental Approaches to Dark Energy and the Cosmological Constant Problem

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ISBN-13:
9783319696317
Einband:
Book
Erscheinungsdatum:
08.12.2017
Seiten:
111
Autor:
Ahmad Borzou
Gewicht:
351 g
Format:
244x161x15 mm
Serie:
Springer Theses
Sprache:
Englisch
Beschreibung:

Explores both theoretical and experimental solutions to the cosmological constant problem
Chapter1. Introduction.- Chapter2. Dark Energy.- Chapter3. A Lorentz gauge theory of gravity.- Chapter4. Standard Model and Supersymmetry.- Chapter5. The Large Hadron Collider.- Chapter6. The Compact Muon Solenoid. Chapter7. Search for supersymmetry in the multijet and missing transverse momentum channel in pp collisions at 13 TeV.- Chapter8. Summary.
This thesis represents a unique mix of theoretical work discussing the Lorentz theory of gravity and experimental work searching for supersymmetry with the Compact Muon Solenoid experiment at the Large Hadron Collider. It begins by reviewing a set of widely-discussed theoretical solutions to the cosmological constant problem, including a natural solution provided by the recently developed Lorentz gauge theory of gravity. The Schwartzschild metric, de Sitter space, and quantum versions of the theory are also discussed. The thesis then looks to supersymmetry for an alternative solution. The idea behind supersymmetry is reviewed and an experimental search for supersymmetry is presented. A major contribution was to estimate one of the most significant backgrounds in this search, which arises from top-antitop quark pair production or W boson production in association with multiple jets where the W boson decays into the hadronically-decaying tau leptons and neutrinos. This background was estimated through a novel method involving kinematically analogous events but including a well-measured muon. This search significantly extends limits on supersymmetric partners of gluons from previous searches.