Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"supersymmetric particles"”.
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Search for supersymmetric particles from Z decays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Searches for supersymmetric particles and ATLAS track triggers
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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CP violation in production and decay of supersymmetric particles
In dieser Dissertation untersuchen wir CP verletzende Effekte von MSSM-Phasen in Produktion und Zwei-Teilchen-Zerfaellen von Neutralinos, Charginos und Sfermionen. Fuer verschiedene supersymmetrische Prozesse definieren und berechnen wir CP-ungerade Asymmetrien, welche auf Spatprodukten basieren. …
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Searches for supersymmetric particles in leptonic final states with the ATLAS detector
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Search for supersymmetric particles in opposite sign dilepton events with the CMS detector
In this thesis a search for supersymmetric particles in the data collected by CMS at center of mass energy of 7 TeV is presented. The search is focused on the selection of events characterized by pairs of opposite sign electrons or muons. This particular exclusive signature (which we refer to as …
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SEARCH FOR ELECTROWEAK PRODUCTION OF SUPERSYMMETRIC PARTICLES IN COMPRESSED MASS SPECTRA WITH THE ATLAS DETECTOR AT THE LHC
In questa tesi, sono presentate due analisi che cercano la produzione di particelle supersimmetriche attraverso l'interazione elettrodebole: la ricerca di chargini, dove i chargini prodotti decadono in bosoni W e neutralini, e la ricerca di tracce displaced, ossia di tracce cariche spostate dal …
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Searches for supersymmetric particles in events with two opposite-sign same-flavor leptons, jets, and large missing transverse energy
This thesis presents the search for Supersymmetric particles, in both strong and electroweak productions, in the same-flavor opposite-sign dilepton channel. The SUSY analyses usually require large missing transverse energy MET for the presence of invisible LSPs. One of the most difficult background …
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First search for electroweak supersymmetry in final states with hadronic decays of WW, WZ, or WH boson pair and missing transverse momentum.
… model in the form of electroweak production of supersymmetric particles, specifically charginos and neutralinos. The novel search is performed using Run 2 data from the CMS experiment at the LHC with a total integrated luminosity of 137 fb−1 . The targeted final states include a pair of bosons …
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Analysis of a deep neural network for missing transverse momentum reconstruction in ATLAS
… presence and combined kinematics of unobserved particles can be inferred by the observed momentum imbalance in the transverse plane. In this work, a deep neural network was trained using supervised learning to measure this imbalance. The performance of this network was evaluated in MC simulation …
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Search for supersymmetric partners of the top quark with the CMS detector and novel top quark tagging algorithms.
… in explaining observed interactions of subatomic particles. The model was largely vindicated with the announced observation of the Higgs boson by the ATLAS and CMS experiments at the LHC. The astronomical observation of dark matter, among other reasons, motivates us to look for particles not part …
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A Study of Equivalence of SUSY Theories using Adinkras and Super Virasoro Algebras
… a wide number of quantum field theories with supersymmetric particles interacting. By using two methods, Adinkras and Super Virasoro algebras (SVAs), more information is gained about SUSY theories: (a.) when two representation may be considered equivalent, that is, describing the same physics, …
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Enhancing the sensitivity of the ATLAS experiment to electroweak supersymmetry
… physics describes all observed fundamental particles and their interactions, but is incomplete. The ATLAS experiment at the Large Hadron Collider has performed a suite of searches for new fundamental particles predicted by `beyond-the-Standard Model' theories such as supersymmetry (SUSY). As …
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Targeting Natural Supersymmetry With Top Quarks
… to top quarks, b jets, and a variety of other supersymmetric particles. Stop masses as large as 950 GeV are excluded at 95% confidence level when decaying to a top quark and massless lightest supersymmetric particle (LSP). In scenarios where the LSP is a Higgsino, exclusions vary from 600 to …
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Machine learning based searches for new physics at the ATLAS experiment
… where there is a low mass-splitting between the supersymmetric particles considered – the lightest chargino and the lightest neutralino. Using a boosted decision tree to perform multiclass classification, separate regions in phase space can be defined that are enriched in either signal or a …
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Higher order and CP-violating effects in the neutralino and Higgs boson sectors of the MSSM
… such a light Higgs boson in cascade decays of supersymmetric particles. We also study the full Higgs production and decay processes in scenarios where the intermediate Higgs bosons are nearly mass degenerate and interference effects can have a significant impact. We find that an on-shell …
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TRACKING THE INVISIBLE. A SEARCH FOR SUPERSYMMETRIC HIGGSINOS WITH THE ATLAS DETECTOR.
… thesis presents two complementary searches for supersymmetric particles with compressed mass spectra using proton-proton collision data collected by the ATLAS detector during the LHC Run 2 and Run 3. The analyses target the production of charginos and neutralinos near the electroweak scale and …
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Extending the Reach of Searches for Staus, Charginos and Neutralinos with the ATLAS Experiment at the Large Hadron Collider
… sensitivity reach of searches for three types of supersymmetric particles; staus, charginos and neutralinos, using the 139 fb⁻¹ of data collected with the ATLAS experiment at the Large Hadron Collider between 2015 and 2018. Searches for three different production modes of these particles are …
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Search for R-parity violating supersymmetry in multilepton final states with the DŸ detector
… Pairwise, R-parity conserving production of the supersymmetric particles is assumed, followed by R-parity violating decays via an LLE-operator with one dominant coupling lambda_122. An LLE-operator couples two weak isospin doublet and one singlet (s)lepton fields and thus violates lepton number …
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Characterization of the CMS pixel detectors
… is the search of the Higgs boson(s) and the supersymmetric particles. The programme is also proposed to detect a range of diverse signatures in order to provide guidance for future physics. The pixel detector system makes up the innermost part of the CMS experiment, which is one of the two …
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Suche nach R-paritätsverletzenden Zerfällen supersymmetrischer Teilchen in Endzuständen mit Jets und Leptonen mit dem OPAL-Detektor bei LEP
Von allen in den Jahren 1998 bis 2000 mit dem OPAL-Detektor am <br>e+e--Speicherring LEP am CERN aufgenommenen Daten wurden jene Ereignisse untersucht, in <br>denen geladene Leptonen und hadronische Jets nachgewiesen wurden. Dabei wurde nach Anzeichen für spezielle Zerfälle neuer Teilchen gesucht. …