Searches for Dijet Resonances Using √s = 13 TeV Proton-Proton Collision Data Recorded by the ATLAS Detector at the Large Hadron Collider /

• Main Author: Beresford, Lydia Audrey (Author, http://id.loc.gov/vocabulary/relators/aut)
• Corporate Author: SpringerLink (Online service)
• Format: Electronic eBook
• Language: English
• Published: Cham : Springer International Publishing : Imprint: Springer, 2018.
• Edition: 1st ed. 2018.
• Series: Springer Theses, Recognizing Outstanding Ph.D. Research,
• Subjects: Nuclear physics.; Heavy ions.; Elementary particles (Physics).; Quantum field theory.; Cosmology.; Nuclear Physics, Heavy Ions, Hadrons.; Elementary Particles, Quantum Field Theory.
• Physical Description: XIII, 169 p. 101 illus., 50 illus. in color. online resource.
• ISBN: 9783319975207
• ISSN: 2190-5053
• DOI: 10.1007/978-3-319-97520-7

This book addresses one of the most intriguing mysteries of our universe: the nature of dark matter. The results presented here mark a significant and substantial contribution to the search for new physics, in particular for new particles that couple to dark matter. The first analysis presented is a search for heavy new particles that decay into pairs of hadronic jets (dijets). This pioneering analysis explores unprecedented dijet invariant masses, reaching nearly 7 TeV, and sets constraints on several important new physics models. The two subsequent analyses focus on the difficult low dijet mass region, down to 200 GeV, and employ a novel technique to efficiently gather low-mass dijet events. The results of these analyses transcend the long-standing constraints on dark matter mediator particles set by several existing experiments.