TY  - BOOK
AU  - Jones,Samuel
ED  - SpringerLink (Online service)
TI  - Searching for Squarks: in Compressed States and States with Jets from Charm Quarks with the Atlas Detector 
T2  - Springer Theses, Recognizing Outstanding Ph.D. Research,
SN  - 9783030542887
AV  - QC793-793.5 
U1  - 539.72 23
PY  - 2020///
CY  - Cham
PB  - Springer International Publishing, Imprint: Springer
KW  - Elementary particles (Physics)
KW  - Quantum field theory
KW  - Physical measurements
KW  - Measurement   
KW  - Elementary Particles, Quantum Field Theory
KW  - Measurement Science and Instrumentation
N1  - Introduction -- Theoretical Background -- The ATLAS Experiment -- Data Acquisition and Reconstruction -- Search for SUSY in Final States with Jets from Charm Quarks -- Soft b-tagging in Compressed SUSY Scenarios -- Conclusion -- Appendix
N2  - 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
UR  - https://doi.org/10.1007/978-3-030-54288-7
ER  -