001444329 000__ 03367cam\a2200517Ia\4500 001444329 001__ 1444329 001444329 003__ OCoLC 001444329 005__ 20230310003704.0 001444329 006__ m\\\\\o\\d\\\\\\\\ 001444329 007__ cr\un\nnnunnun 001444329 008__ 220209s2022\\\\sz\\\\\\ob\\\\000\0\eng\d 001444329 019__ $$a1296116041$$a1296426486$$a1298391723 001444329 020__ $$a9783030916725$$q(electronic bk.) 001444329 020__ $$a3030916723$$q(electronic bk.) 001444329 020__ $$z3030916715 001444329 020__ $$z9783030916718 001444329 0247_ $$a10.1007/978-3-030-91672-5$$2doi 001444329 035__ $$aSP(OCoLC)1296086201 001444329 040__ $$aYDX$$beng$$cYDX$$dGW5XE$$dEBLCP$$dOCLCO$$dOCLCF$$dUKAHL$$dOCLCQ 001444329 049__ $$aISEA 001444329 050_4 $$aQC793.5.L422 001444329 08204 $$a539.7/211$$223 001444329 1001_ $$aHoryn, Lesya. 001444329 24510 $$aSearch for displaced leptons in the ATLAS detector /$$cLesya Horyn. 001444329 260__ $$aCham, Switzerland :$$bSpringer,$$c2022. 001444329 300__ $$a1 online resource. 001444329 4901_ $$aSpringer theses 001444329 500__ $$a"Doctoral Thesis accepted by the University of Chicago, USA." 001444329 504__ $$aIncludes bibliographical references. 001444329 5050_ $$aPart 1: Introduction and Motivation -- Chapter 1: Introduction -- Chapter 2: Theory -- Part 2: The Experiment -- Chapter 3: The Large Hadron Collider -- Chapter 4: The ATLAS detector -- Chapter 5: Object Reconstruction -- Chapter 6: Data and Monte Carlo Samples -- Part 3: Long Lived Particle Context -- Chapter 7: Searching for Long Lived Particles -- Chapter 8: Experimental Context -- Part 4: Search for Displaced Leptons -- Chapter 9: Event Selection -- Chapter 10: Backgrounds -- Chapter 11: Signal Systematics -- Part 5: Results -- Chapter 12: Results -- Chapter 13: Interpretation -- Chapter 14: Conclusions and Future Improvements. 001444329 506__ $$aAccess limited to authorized users. 001444329 520__ $$aThis 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). 001444329 588__ $$aOnline resource; title from PDF title page (SpringerLink, viewed February 23, 2022). 001444329 650_0 $$aLeptons (Nuclear physics) 001444329 650_0 $$aFermions. 001444329 650_6 $$aLeptons (Physique nucléaire) 001444329 650_6 $$aFermions. 001444329 655_0 $$aElectronic books. 001444329 77608 $$iPrint version: $$z3030916715$$z9783030916718$$w(OCoLC)1280604346 001444329 830_0 $$aSpringer theses. 001444329 852__ $$bebk 001444329 85640 $$3Springer Nature$$uhttps://univsouthin.idm.oclc.org/login?url=https://link.springer.com/10.1007/978-3-030-91672-5$$zOnline Access$$91397441.1 001444329 909CO $$ooai:library.usi.edu:1444329$$pGLOBAL_SET 001444329 980__ $$aBIB 001444329 980__ $$aEBOOK 001444329 982__ $$aEbook 001444329 983__ $$aOnline 001444329 994__ $$a92$$bISE