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Author : Julien de Graat
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (811 download)
Download or read book Search for Supersymmetry in Multilepton Events with the ATLAS Detector written by Julien de Graat and published by . This book was released on 2012 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Valentina Santina Gallo
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (86 download)
Download or read book Search for Supersymmetry in Multilepton Final States with the ATLAS Detector at the LHC written by Valentina Santina Gallo and published by . This book was released on 2012 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Steven Farrell
Publisher :
ISBN 13 : 9781303654763
Total Pages : 216 pages
Book Rating : 4.6/5 (547 download)
Download or read book Searches for Supersymmetry in Multilepton Final States with the ATLAS Detector written by Steven Farrell and published by . This book was released on 2014 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two searches for supersymmetry in multilepton final states are presented using pp collisions at sqrt(s) = 8 TeV in the ATLAS detector. First, a search for electroweak production of charginos and neutralinos in the three-lepton plus missing transverse momentum channel is detailed with an emphasis on the fake-lepton background estimation technique. No significant excess above the Standard Model prediction is observed in the signal regions. Exclusion limits are thus placed on simplified models of chargino1-neutralino2 production and decays via intermediate sleptons, SM gauge bosons, and Higgs bosons. The results are also interpreted in terms of the phenomenological MSSM. Next, a search for R-parity violating and R-parity conserving supersymmetric scenarios in the four-lepton channel is presented. No significant excess is observed, so exclusion limits are placed R-parity violating simplified models in which the lightest supersymmetric particle is the lightest neutralino, which promptly decays to leptons. Exclusion limits are also placed on R-parity conserving simplified models of neutralino2-neutralino3 production.
![Download Measurement of WWW Production and Search for Supersymmetric Particles in Multi-lepton Final States in Pp Collisions at [square Root]8 PDF Online Free](https://books.google.com/books/content/images/frontcover/EQ7WzQEACAAJ?fife=w200-h370)
Author : Martina Javůrková
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (992 download)
Download or read book Measurement of WWW Production and Search for Supersymmetric Particles in Multi-lepton Final States in Pp Collisions at [square Root]8 written by Martina Javůrková and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The results presented in this thesis use the full dataset collected in 2012 by the ATLAS experiment from the LHC proton-proton collisions at sqrt(s) = 8 TeV, corresponding to an integrated luminosity of 20.3 fb^(−1). The first part is devoted to the search for the WWW production in the decay channel where each W boson decays leptonically (excluding leptonic tau decays). Upper limits are placed on the production cross-section in the fiducial phase space. The results are also interpreted in terms of the total cross-section when combined together with the semi-leptonic decay channel. In addition, limits on anomalous quartic gauge boson couplings in an effective field theory approach are extracted. The second part presents a search for supersymmetry in events with multiple jets, two leptons of identical charges or three leptons (electrons or muons). The absence of any excess in the signal regions with respect to the Standard Model expectations is interpreted in terms of limits in the parameter space of 14 supersymmetric models and one mUED model
Author : Fabio Cardillo
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)
Download or read book Search for Supersymmetry in Events with Two Same-sign Leptons Or Three Leptons with the ATLAS Detector at √s written by Fabio Cardillo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stewart Martin-Haugh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (885 download)
Download or read book Searches for Supersymmetry in Events with Three Leptons at the ATLAS Detector written by Stewart Martin-Haugh and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Valerio Rossetti
Publisher : Springer
ISBN 13 : 3319222252
Total Pages : 173 pages
Book Rating : 4.3/5 (192 download)
Download or read book Search for Exotic Mono-jet Events written by Valerio Rossetti and published by Springer. This book was released on 2015-08-24 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes in detail the search for new phenomena in mono-jet final states with the ATLAS experiment at the LHC. The final state is considered the golden channel in the searches for large extra dimensions (LED) but also allows access to a very rich SUSY-related phenomenology pertaining to the production of weakly interacting massive particles (WIMPS), SUSY Dark Matter candidates, GMSB SUSY models with very light gravitino masses, as well as stop an sbottom pair production in compressed scenarios (with nearly degenerated squarks and the lightest neutralino), and also invisible Higgs searches, among others. Here, a number of these scenarios are explored. The measurements presented yield new powerful constraints on the existence of extra spatial dimensions, the pair production of WIMPs, and also provide the best limit to date on the gravitino mass.
Author : Chiara Rizzi
Publisher : Springer Nature
ISBN 13 : 3030528774
Total Pages : 279 pages
Book Rating : 4.0/5 (35 download)
Download or read book Searches for Supersymmetric Particles in Final States with Multiple Top and Bottom Quarks with the Atlas Detector written by Chiara Rizzi and published by Springer Nature. This book was released on 2020-09-01 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This PhD thesis documents two of the highest-profile searches for supersymmetry performed at the ATLAS experiment using up to 80/fb of proton-proton collision data at a center-of-mass energy of 13 TeV delivered by the Large Hadron Collider (LHC) during its Run 2 (2015-2018). The signals of interest feature a high multiplicity of jets originating from the hadronisation of b-quarks and large missing transverse momentum, which constitutes one of the most promising final state signatures for discovery of new phenomena at the LHC. The first search is focused on the strong production of a pair of gluinos, with each gluino decaying into a neutralino and a top-antitop-quark pair or a bottom-antibottom-quark pair. The second search targets the pair production of higgsinos, with each higgsino decaying into a gravitino and a Higgs boson, which in turn is required to decay into a bottom-antibottom-quark pair. Both searches employ state-of-the-art experimental techniques and analysis strategies at the LHC, resulting in some of the most restrictive bounds available to date on the masses of the gluino,neutralino, and higgsino in the context of the models explored.
Author : Matthew Henry Klein
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (982 download)
Download or read book Search for R-parity Violating Supersymmetry in Multilepton Final States Using the ATLAS Detector written by Matthew Henry Klein and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for R-parity violating supersymmetry at sqrt(s)=13 TeV, using approximately 13.3 fb-1 of data collected by ATLAS in 2015 and the first half of 2016. Events are required to contain at least four leptons (electrons or muons only) that are not the product of a Z boson decay, and this requirement results in a low Standard Model background and a high sensitivity to various physics models beyond the Standard Model. No significant deviations from the Standard Model are observed in data, and results are used to set upper limits on the event yields from processes beyond the Standard Model. In a simplified model of chargino production with indirect R-parity violating decays, limits are extended by approximately 400 GeV relative to the Run 1 search, excluding chargino masses below 1.1 TeV.
Author : Stefan Winkelmann
Publisher :
ISBN 13 :
Total Pages : 161 pages
Book Rating : 4.:/5 (971 download)
Download or read book Search for Supersymmetry in Events with Missing Transverse Energy and B-Jets with the ATLAS Detector written by Stefan Winkelmann and published by . This book was released on 2012 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: In this thesis, searches for Supersymmetry (SUSY) with the ATLAS detector at the Large Hadron Collider (LHC) at a center-of-mass energy of 7 TeV are presented. The focus lies on two searches for squarks of the third generation, specifically the direct production of stop pairs and the production of stops via the decay of gluinos. The searches are based on experimental signatures with large missing transverse energy, b-quark jets and one electron or muon. The datasets used correspond to an integrated luminosity of 4.7 fb-1 and 2.05 fb-1, respectively. Inclusive observables, which are sensitive to the mass scale of SUSY particles are used to discriminate the signal from the Standard Model (SM) background processes. In both analyses, dedicated background estimation techniques are used. Control samples in data are used to supplement or replace the background estimation from Monte Carlo simulation. No significant excess beyond the SM expectation is found. Therefore, both model independent upper limits on physics beyond the SM are derived and model specific interpretations are given
Author : Anthony Rose
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (872 download)
Download or read book Search for Supersymmetry in Events with Leptons (e, Μ, Τ), Jets and Missing Transverse Energy with the ATLAS Detector at the LHC. written by Anthony Rose and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zara Grout
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Supersymmetry Searches in Events with at Least Four Leptons Using the ATLAS Detector at the Large Hadron Collider written by Zara Grout and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nikolai Hartmann
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)
Download or read book Search for Supersymmetry in Events with an Isolated Lepton, at Least 2-9 Jets and Missing Transverse Momentum with the ATLAS Detector written by Nikolai Hartmann and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matthias Hamer
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (931 download)
Download or read book Search for Supersymmetry in Final States with Leptons with the ATLAS Detector at the Large Hadron Collider written by Matthias Hamer and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: After a short review of the Standard Model of Elementary Particle Physics and its minimal supersymmetric extension, the MSSM, a global analysis of two highly simplified supersymmetric models, the CMSSM and the NUHM1 is presented, with a focus on the fine-tuning of these models. A new, phenomenologically motivated measure for fine-tuning is introduced. In addition, a search for supersymmetry in final states with four leptons is presented, where a procedure for the consideration of trigger efficiencies with a focus on the calculation of uncertainties on the sum of event weights is given. Fina ...
Author : Marco Valente
Publisher : Springer Nature
ISBN 13 : 3030940470
Total Pages : 231 pages
Book Rating : 4.0/5 (39 download)
Download or read book Supersymmetric Beasts and Where to Find Them written by Marco Valente and published by Springer Nature. This book was released on 2022-03-05 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an extensive overview of the Standard Model and of the theory and phenomenology of Supersymmetry, this book describes the recent development of the ATLAS Particle Flow algorithm, a hadronic reconstruction technique aiming at enhancing the sensitivity of the experiment to new physics through the combination of the information from different ATLAS sub-detectors. The first ever ATLAS strong SUSY search exploiting this technique is also described, reporting the results and exclusion limits obtained using the complete proton-proton collision dataset recorded by the ATLAS experiment during the second Run of the Large Hadron Collider (LHC).
Author : Stefan Winkelmann
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (985 download)
Download or read book Search for Supersymmetry in Events with Missing Transverse Energy and B-Jets with the ATLAS Detector written by Stefan Winkelmann and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Meisam Ghasemi Bostanabad
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book Search for Supersymmetry in Final States with Multiple Bottom Quarks with the ATLAS Detector written by Meisam Ghasemi Bostanabad and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical development of the Standard Model in the 1960s and 1970s has led to the discovery of its missing piece, the Higgs boson, at the ATLAS experiment (together with its sister experiment, CMS) at the Large Hadron Collider at CERN in 2012. In order to solve the problem of large quantum corrections to the leading expansion of the Higgs boson mass, additional symmetries need to be added to the Standard Model. A possible solution to this problem of Higgs mass quantum corrections is the theory of Supersymmetry, which includes partners to each Standard Model particle, such as gluinos, squarks, and the lightest supersymmetric particle. This dissertation describes a search for pair-produced gluinos, where each gluino decays via a top squark or a bottom squark to the lightest supersymmetric particle (a neutralino). Events which contain a large jet multiplicity in the final state (i.e. at least four jets of which at least three must be b-jets), and large amounts of missing transverse energy, are obtained for further studies. The dataset used for this search includes 139 fb^−1 of integrated luminosity recorded by the ATLAS experiment between 2015 and 2018 at a center-of-mass energy √s = 13 TeV. No significant excess is observed in data above the Standard Model backgrounds, and gluino masses up to 2.3 TeV for both the Gtt and the Gbb models are excluded at a 95% confidence level. This dissertation also contains an overview of, and the author's work on, the data quality monitoring of the ATLAS liquid argon calorimeter during 2017 data taking.
