Searching for Squarks: in Compressed States and States with Jets from Charm Quarks with the Atlas Detector...

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Samuel Jones

Searching for Squarks

in Compressed States and States with Jets from Charm Quarks with the Atlas Detector

Samuel Jones

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English

Springer Nature Switzerland AG
28 August 2021

Mensuration & systems of measurement; Particle & high-energy physics

Series: Springer Theses

Summary
Details

This thesis focuses on searches for squarks with the ATLAS detector in ""compressed"" scenarios where the scalar top is very close in mass to the lightest supersymmetric particle. These models are theoretically appealing because the presence of a quasi-degenerate scalar top enhances the self-annihilation cross-section of the lightest supersymmetric particle, acting therefore as a regulator of the dark matter relic density. Two main analyses are presented: the first is a search for scalar tops decaying to charm quarks. The identification of jets originating from the charm quark is very challenging due to its short lifetime. The calibration of tools for charm-tagging has paved the way to measuring the decay of the Higgs boson to pairs of charm quarks. The second analysis presented is the development of a novel technique for reconstructing low momentum b-hadrons. This tool has enabled the ATLAS collaboration to explore topologies that were previously inaccessible.

By: Samuel Jones
Imprint: Springer Nature Switzerland AG
Country of Publication: Switzerland
Edition: 2020 ed.
Dimensions: Height: 235mm, Width: 155mm,
Weight: 379g
ISBN: 9783030542900
ISBN 10: 3030542904
Series: Springer Theses
Pages: 223
Publication Date: 28 August 2021
Audience: Professional and scholarly , Undergraduate
Format: Paperback
Publisher's Status: Active