Search for New Physics in Pp Collisions in Final States with Tau Leptons, B-jets and Missing Transverse Momentum with the ATLAS Detector in LHC Run 2
Title | Search for New Physics in Pp Collisions in Final States with Tau Leptons, B-jets and Missing Transverse Momentum with the ATLAS Detector in LHC Run 2 PDF eBook |
Author | Ferdinand Krieter |
Publisher | |
Pages | 0 |
Release | 2021 |
Genre | Jets |
ISBN |
The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction
Title | The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction PDF eBook |
Author | Giordon Stark |
Publisher | Springer Nature |
Pages | 263 |
Release | 2020-03-13 |
Genre | Science |
ISBN | 3030345483 |
This thesis represents one of the most comprehensive and in-depth studies of the use of Lorentz-boosted hadronic final state systems in the search for signals of Supersymmetry conducted to date at the Large Hadron Collider. A thorough assessment is performed of the observables that provide enhanced sensitivity to new physics signals otherwise hidden under an enormous background of top quark pairs produced by Standard Model processes. This is complemented by an ingenious analysis optimization procedure that allowed for extending the reach of this analysis by hundreds of GeV in mass of these hypothetical new particles. Lastly, the combination of both deep, thoughtful physics analysis with the development of high-speed electronics for identifying and selecting these same objects is not only unique, but also revolutionary. The Global Feature Extraction system that the author played a critical role in bringing to fruition represents the first dedicated hardware device for selecting these Lorentz-boosted hadronic systems in real-time using state-of-the-art processing chips and embedded systems.
Search for Dark Matter with the ATLAS Detector
Title | Search for Dark Matter with the ATLAS Detector PDF eBook |
Author | Johanna Gramling |
Publisher | Springer |
Pages | 290 |
Release | 2018-08-01 |
Genre | Science |
ISBN | 3319950169 |
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.
Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like?
Title | Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like? PDF eBook |
Author | Roman Pasechnik |
Publisher | Frontiers Media SA |
Pages | 180 |
Release | 2020-09-03 |
Genre | Science |
ISBN | 2889639908 |
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
A Search for Displaced Leptons in the ATLAS Detector
Title | A Search for Displaced Leptons in the ATLAS Detector PDF eBook |
Author | Lesya Horyn |
Publisher | Springer Nature |
Pages | 146 |
Release | 2022-02-07 |
Genre | Science |
ISBN | 3030916723 |
This thesis presents a search for long-lived particles decaying into displaced electrons and/or muons with large impact parameters. This signature provides unique sensitivity to the production of theoretical lepton-partners, sleptons. These particles are a feature of supersymmetric theories, which seek to address unanswered questions in nature. The signature searched for in this thesis is difficult to identify, and in fact, this is the first time it has been probed at the Large Hadron Collider (LHC). It covers a long-standing gap in coverage of possible new physics signatures. This thesis describes the special reconstruction and identification algorithms used to select leptons with large impact parameters and the details of the background estimation. The results are consistent with background, so limits on slepton masses and lifetimes in this model are calculated at 95% CL, drastically improving on the previous best limits from the Large Electron Positron Collider (LEP).
Heavy Quark Physics
Title | Heavy Quark Physics PDF eBook |
Author | Aneesh V. Manohar |
Publisher | Cambridge University Press |
Pages | 205 |
Release | 2023-07-31 |
Genre | Science |
ISBN | 1009402145 |
A Search for New Physics in Final States With Two Opposite-SignSame-Flavor Leptons, Jets, and Missing Transverse Energy InProton-Proton Collisions with a Center of Mass Energy of 13 TeV
Title | A Search for New Physics in Final States With Two Opposite-SignSame-Flavor Leptons, Jets, and Missing Transverse Energy InProton-Proton Collisions with a Center of Mass Energy of 13 TeV PDF eBook |
Author | Charles Vincent Welke |
Publisher | |
Pages | 142 |
Release | 2016 |
Genre | |
ISBN |
A search is performed in final states with Z$\rightarrow\ell\ell$, jets, and missing transverse momentum using data collected with the CMS detector at the CERN LHC in 2015 corresponding to an integrated luminosity of 2.3~\fbinv of pp collisions at $\sqrt{s}=13$\TeV. Signal regions are defined to maximize sensitivity to new physics including one to search where ATLAS reported a 3.0~$\sigma$ excess at 8~TeV. The observations in all regions are consistent with the predicted standard model backgrounds, and the results are interpreted in the context of simplified models of supersymmetry.