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Author | : Steven Schramm |
Publisher | : Springer |
Total Pages | : 341 |
Release | : 2016-11-23 |
Genre | : Science |
ISBN | : 3319444530 |
Download Searching for Dark Matter with the ATLAS Detector Book in PDF, ePub and Kindle
This thesis describes the search for Dark Matter at the LHC in the mono-jet plus missing transverse momentum final state, using the full dataset recorded in 2012 by the ATLAS Experiment. It is the first time that the number of jets is not explicitly restricted to one or two, thus increasing the sensitivity to new signals. Instead, a balance between the most energetic jet and the missing transverse momentum is required, thus selecting mono-jet-like final states. Collider searches for Dark Matter have typically used signal models employing effective field theories (EFTs), even when comparing to results from direct and indirect detection experiments, where the difference in energy scale renders many such comparisons invalid. The thesis features the first robust and comprehensive treatment of the validity of EFTs in collider searches, and provides a means by which the different classifications of Dark Matter experiments can be compared on a sound and fair basis.
Author | : Johanna Gramling |
Publisher | : Springer |
Total Pages | : 282 |
Release | : 2018-08-01 |
Genre | : Science |
ISBN | : 3319950169 |
Download Search for Dark Matter with the ATLAS Detector Book in PDF, ePub and Kindle
This book discusses searches for Dark Matter at the CERN’s LHC, the world’s most powerful accelerator. It introduces the relevant theoretical framework and includes an in-depth discussion of the Effective Field Theory approach to Dark Matter production and its validity, as well as an overview of the formalism of Simplified Dark Matter models. Despite overwhelming astrophysical evidence for Dark Matter and numerous experimental efforts to detect it, the nature of Dark Matter still remains a mystery and has become one of the hottest research topics in fundamental physics. Two searches for Dark Matter are presented, performed on data collected with the ATLAS experiment. They analyze missing-energy final states with a jet or with top quarks. The analyses are explained in detail, and the outcomes and their interpretations are discussed, also in view of the precedent analysis of theoretical approaches. Given its depth of coverage, the book represents an excellent reference guide for all physicists interested in understanding the theoretical and experimental considerations relevant to Dark Matter searches at the LHC.
Author | : Ruth Pöttgen |
Publisher | : Springer |
Total Pages | : 325 |
Release | : 2016-06-29 |
Genre | : Science |
ISBN | : 3319410458 |
Download Search for Dark Matter with ATLAS Book in PDF, ePub and Kindle
This thesis describes in detail a search for weakly interacting massive particles as possible dark matter candidates, making use of so-called mono-jet events. It includes a detailed description of the run-1 system, important operational challenges, and the upgrade for run-2. The nature of dark matter, which accounts for roughly 25% of the energy-matter content of the universe, is one of the biggest open questions in fundamental science. The analysis is based on the full set of proton-proton collisions collected by the ATLAS experiment at the Large Hadron Collider at √s = 8 TeV. Special attention is given to the experimental challenges and analysis techniques, as well as the overall scientific context beyond particle physics. The results complement those of non-collider experiments and yield some of the strongest exclusion bounds on parameters of dark matter models by the end of the Large Hadron Collider run-1. Details of the upgrade of the ATLAS Central Trigger for run-2 are also included.
Author | : Julian Wollrath |
Publisher | : |
Total Pages | : 0 |
Release | : 2020 |
Genre | : |
ISBN | : |
Download Dark Matter Searches with the ATLAS Detector Book in PDF, ePub and Kindle
Author | : Yangyang Cheng |
Publisher | : Springer |
Total Pages | : 183 |
Release | : 2016-09-29 |
Genre | : Science |
ISBN | : 331944218X |
Download Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS Book in PDF, ePub and Kindle
This thesis reports on the search for dark matter in data taken with the ATLAS detector at CERN’s Large Hadron Collider (LHC). The identification of dark matter and the determination of its properties are among the highest priorities in elementary particle physics and cosmology. The most likely candidate, a weakly interacting massive particle, could be produced in the high energy proton-proton collisions at the LHC. The analysis presented here is unique in looking for dark matter produced together with a Higgs boson that decays into its dominant decay mode, a pair of b quarks. If dark matter were seen in this mode, we would learn directly about the production mechanism because of the presence of the Higgs boson. This thesis develops the search technique and presents the most stringent production limit to date.
Author | : Steven Schramm |
Publisher | : |
Total Pages | : 674 |
Release | : 2015 |
Genre | : Physics Theses |
ISBN | : |
Download Searching for Dark Matter with the ATLAS Detector in Events with an Energetic Jet and Large Missing Transverse Momentum Book in PDF, ePub and Kindle
Author | : Johanna Lena Gramling |
Publisher | : |
Total Pages | : 316 |
Release | : 2016 |
Genre | : |
ISBN | : |
Download Search for Dark Matter in Missing-energy Final States with an Energetic Jet Or Top Quarks with the ATLAS Detector Book in PDF, ePub and Kindle
Author | : Alessio Venturini |
Publisher | : |
Total Pages | : 237 |
Release | : 2016 |
Genre | : Dark matter (Astronomy) |
ISBN | : |
Download Searching for Dark Matter in the Mono-jet Channel with the ATLAS Detector Book in PDF, ePub and Kindle
Author | : Daniel Silverstein |
Publisher | : |
Total Pages | : |
Release | : 2013 |
Genre | : |
ISBN | : |
Download Machine Learning in the Search for Dark Matter with the ATLAS Detector Book in PDF, ePub and Kindle
The results of a search for pair production of the scalar partners of the bottom quarks in 4.7 fb1 of pp collisions at ps = 7 TeV using the ATLAS detector at the LHC are reported. Scalar bottoms are searched for in events with large missing transverse momentum and two jets identified as originating from a b-quark in the final state. In an R-parity conserving minimal supersymmetric scenario, assuming that the scalar bottom decays exclusively into a bottom quark and a neutralino, 95% confidence-level upper limits are obtained in the b1 c10 mass plane. Exclusions are first calculated using the frequentist method. For c 10 masses less than 150 GeV, b1 masses up to 500 GeV are excluded. The exclusion is extended up to 600 GeV by the use of machine learning methods.
Author | : Manuel Patrice Geisler |
Publisher | : |
Total Pages | : |
Release | : 2018 |
Genre | : |
ISBN | : |
Download Improving Searches for Dark Matter Using Missing Transverse Momentum and Jets Book in PDF, ePub and Kindle