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Measurement Of The Inclusive Electron Cross Section From Heavy Flavour Decays And Search For Compressed Supersymmetric Scenarios With The Atlas Experiment
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Book Synopsis Measurement of the Inclusive Electron Cross-Section from Heavy-Flavour Decays and Search for Compressed Supersymmetric Scenarios with the ATLAS Experiment by : Moritz Backes
Download or read book Measurement of the Inclusive Electron Cross-Section from Heavy-Flavour Decays and Search for Compressed Supersymmetric Scenarios with the ATLAS Experiment written by Moritz Backes and published by Springer. This book was released on 2014-06-11 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of this thesis presents the measurement of the inclusive cross-section for electron production from heavy-flavour decays in the electron transverse momentum range 7 GeV
Book Synopsis Measurement of the Inclusive Electron Cross-section from Heavy Flavour Decays and of the Bottom Production Rate with the ATLAS Experiment by : María Clemencia Rosario Mora Herrera
Download or read book Measurement of the Inclusive Electron Cross-section from Heavy Flavour Decays and of the Bottom Production Rate with the ATLAS Experiment written by María Clemencia Rosario Mora Herrera and published by . This book was released on 2012 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Cross Section Measurement of Events with Two Muons at the Z0 Resonance and at Least One Heavy Flavour Jet at the ATLAS Experiment of the Large Hadron Collider by :
Download or read book A Cross Section Measurement of Events with Two Muons at the Z0 Resonance and at Least One Heavy Flavour Jet at the ATLAS Experiment of the Large Hadron Collider written by and published by . This book was released on 2012 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cross Section Measurement and Search for New Physics with Top Quark Pair Events Involving a Tau Lepton in ATLAS by : Jennifer Lynn Godfrey
Download or read book Cross Section Measurement and Search for New Physics with Top Quark Pair Events Involving a Tau Lepton in ATLAS written by Jennifer Lynn Godfrey and published by . This book was released on 2013 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2011, the ATLAS detector recorded an integrated luminosity of over 5 fb−1 of proton-proton collisions delivered by the LHC at a centre-of-mass square root of s = 7 TeV. The first of two analyses is a test of the standard model and the world's most precise measurement of the top quark pair production cross section for final states which include a hadronically decaying tau lepton. The second analysis uses the same dataset to search for a charged Higgs boson, also resulting in the world's best limits for the search channel. In the cross section measurement, 2.1 fb−1 of ATLAS proton-proton collision data is used to measure the top quark pair production cross section in events containing an isolated electron or muon and a tau lepton decaying hadronically. After initial event requirements, the leading background comes from top quark pairs with jets faking tau leptons. A fit to a tau lepton identification variable is used to determine the signal yield. The measured cross section, [sigma][subscript{tt̄}] 186±13(stat.)±2019(syst.)±7(lumi.)pb, is in good agreement with the standard model prediction. Several extensions to the standard model predict the existence of at least one charged Higgs boson, H[superscript ±]. According to these extensions, the top quark can decay into a bottom quark and a light charged Higgs boson in addition to the standard model decay to a bottom quark and aW boson. In the second analysis, event yield ratios between different final states are measured using 4.6 fb−1 of ATLAS data. This is compared to simulation to search for a violation of lepton universality. This ratio-based method reduces the impact of systematic uncertainties in the analysis. No significant deviations from the standard model predictions are observed. With the assumption that the charged Higgs boson branching ratio to a tau lepton and a neutrino is 100%, upper limits in the range 3.2%-4.4% can be placed on the top quark to charged Higgs branching ratio for 90 less than or equal to m[subscript {H[superscript ±]}] less than or equal to 140 GeV. After combination with results from a search for charged Higgs bosons in tt̄ decays using the thad+jets final state, upper limits on this branching ratio can be set in the range 0.8%-3.4%, for 90 less than or equal to m[subscript {H[superscript ±]}] less than or equal to 140 GeV.
Book Synopsis Electroweak Interactions and Unified Theories by : J. Thanh Van Tran
Download or read book Electroweak Interactions and Unified Theories written by J. Thanh Van Tran and published by Atlantica Séguier Frontières. This book was released on 1988 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Inclusive Electron Cross Section in GammaGamma Collisions at TRISTAN by : M. Iwasaki
Download or read book Measurement of Inclusive Electron Cross Section in GammaGamma Collisions at TRISTAN written by M. Iwasaki and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Inclusive $W\̂pm$ and Z/Gamma Cross Sections in the Electron and Muon Decay Channels in $Pp$ Collisions at $\sqrt{s} by :
Download or read book Measurement of the Inclusive $W\̂pm$ and Z/Gamma Cross Sections in the Electron and Muon Decay Channels in $Pp$ Collisions at $\sqrt{s} written by and published by . This book was released on 2013 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the High Mass Drell-yan Differential Cross Section in the Electron-positron Channel with the ATLAS Experiment at √s by : Katalin Nikolics
Download or read book Measurement of the High Mass Drell-yan Differential Cross Section in the Electron-positron Channel with the ATLAS Experiment at √s written by Katalin Nikolics and published by . This book was released on 2013 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Weak Scale Supersymmetry by : Howard Baer
Download or read book Weak Scale Supersymmetry written by Howard Baer and published by Cambridge University Press. This book was released on 2023-01-31 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This OA text develops the basic concepts of supersymmetry for experimental and phenomenological particle physicists and graduate students.
Book Synopsis A Measurement of Inclusive Quasi-elastic Electron Cross Sections at X > 1 and High Q2 by : Thomas Claude Petitjean
Download or read book A Measurement of Inclusive Quasi-elastic Electron Cross Sections at X > 1 and High Q2 written by Thomas Claude Petitjean and published by . This book was released on 2000 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of the Differential Cross Sections for the Inclusive Production of a Photon and Heavy Flavor Jet by :
Download or read book Measurements of the Differential Cross Sections for the Inclusive Production of a Photon and Heavy Flavor Jet written by and published by . This book was released on 2009 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the first measurement of the differential production cross section of a heavy flavor (bottom or charm) jet and direct photon at the Fermilab Tevatron. These measurements were performed using data recorded with the D0 detector from proton-antiproton collisions at a center of mass energy of √s = 1.96 TeV. These results probe a kinematic range for the photon transverse momentum of 30
Book Synopsis Measurement of the $\mathrm{ T \bar{t} }$ Production Cross Section in the $\mathrm{ E \mu }$ Channel in Proton-proton Collisions at $\sqrt{s} by :
Download or read book Measurement of the $\mathrm{ T \bar{t} }$ Production Cross Section in the $\mathrm{ E \mu }$ Channel in Proton-proton Collisions at $\sqrt{s} written by and published by . This book was released on 2016 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inclusive cross section for top quark pair production is measured in proton-proton collisions at √s = 7 and 8 TeV, corresponding to 5.0 and 19.7 fb-1, respectively, with the CMS experiment at the LHC. The cross sections are measured in the electron-muon channel using a binned likelihood fit to multi-differential final state distributions related to identified b quark jets and other jets in the event. The measured cross section values are 173.6 ± 2.1 (stat)+4.5-4.0 (syst) ± 3.8 (lumi) pb at √s = 7 TeV, and 244.9 ± 1.4 (stat)+6.3-5.5 (syst) ± 6.4 (lumi) pb at √s = 8 TeV, in good agreement with QCD calculations at next-to-next-to-leading-order accuracy. The ratio of the cross sections measured at 7 and 8 TeV is determined, as well as cross sections in the fiducial regions defined by the acceptance requirements on the two charged leptons in the final state. The cross section results are used to determine the top quark pole mass via the dependence of the theoretically predicted cross section on the mass, giving a best result of 173.8+1.7-1.8 GeV. Furthermore, the data at √s = 8 TeV are also used to set limits, for two neutralino mass values, on the pair production of supersymmetric top squarks with masses close to the top quark mass.
Book Synopsis Inclusive Electron Scattering from Nuclei in the Quasielastic Region at Large Momentum Transfer by :
Download or read book Inclusive Electron Scattering from Nuclei in the Quasielastic Region at Large Momentum Transfer written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiment E02-019, performed in Hall C at the Thomas Jefferson National Accelerator Facility (TJNAF), was a measurement of inclusive electron cross sections for several nuclei (2H,3He, 4He, 9Be,12C, 63Cu, and 197Au) in the quasielastic region at high momentum transfer. In the region of low energy transfer, the cross sections were analyzed in terms of the reduced response, F(y), by examining its y-scaling behavior. The data were also examined in terms of the nuclear structure function [nu]WA 2 and its behavior in x and the Nachtmann variable [xi]. The data show approximate scaling of [nu]WA 2 in [xi] for all targets at all kinematics, unlike scaling in x, which is confined to the DIS regime. However, y-scaling observations are limited to the kinematic region dominated by the quasielastic response (y
Book Synopsis Simultaneous Heavy Flavor Fractions and Top Cross Section Measurement at the Collider Detector at Fermilab by :
Download or read book Simultaneous Heavy Flavor Fractions and Top Cross Section Measurement at the Collider Detector at Fermilab written by and published by . This book was released on 2010 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the measurement of the top pair production cross section, using data from proton-antiproton collisions at a center-of-mass energy of 1.96 TeV, with 2.7 ± 0.2 fb−1 of data collected by the Collider Detector at Fermilab. Background contributions are measured concurrently with the top cross section in the b-tagged lepton-plus-jets sample using a kinematic fit, which simultaneously determines the cross sections and normalizations of t{bar t}, W + jets, QCD, and electroweak processes. This is the first application of a procedure of this kind. The top cross section is measured to be [sigma]{sub t{bar t}} = 7.64 ± 0.57(stat + syst) ± 0.45(lumi) pb and the Monte Carlo simulation scale factors K{sub Wb{bar b}} = 1.57 ± 0.25, K{sub Wc{bar c}} = 0.94 ± 0.79, K{sub Wc} = 1.9 ± 0.3, and K{sub Wq{bar q}} = 1.1 ± 0.3. These results are consistent with existing measurements using other procedures. More data will reduce the systematic uncertainties and will lead to the most precise of any single analysis to date.
Book Synopsis Inclusive Electron Scattering From Nuclei at X]1 and High Q^2 by :
Download or read book Inclusive Electron Scattering From Nuclei at X]1 and High Q^2 written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CEBAF experiment e89-008 measured inclusive electron scattering from nuclei in a Q2 range between 0.8 and 7.3 (GeV/c)2 for x{sub Bjorken} approximately greater than 1. The cross sections for scattering from D C, Fe, and Au were measured. The C, Fe, and Au data have been analyzed in terms of F(y) to examine y-scaling of the quasielastic scattering, and to study the momentum distribution of the nucleons in the nucleus. The data have also been analyzed in terms of the structure function vW2 to examine scaling of the inelastic scattering in x and xi and to study the momentum distribution of the quarks. In the regions where quasielastic scattering dominates the cross section (low Q2 or large negative values of y), the data are shown to exhibit y-scaling. However, the y-scaling breaks down once the inelastic contributions become large. The data do not exhibit x-scaling, except at the lowest values of x, while the structure function does appear to scale in the Nachtmann variable, xi.
Book Synopsis Measurements of the W Production Cross Sections in Association with Jets with the ATLAS Detector by :
Download or read book Measurements of the W Production Cross Sections in Association with Jets with the ATLAS Detector written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents cross sections for the production of a W boson in association with jets, measured in proton-proton collisions at \(\sqrt{s} = 7\) TeV with the ATLAS experiment at the large hadron collider. With an integrated luminosity of 4.6fb-1, this data set allows for an exploration of a large kinematic range, including jet production up to a transverse momentum of 1TeV and multiplicities up to seven associated jets. The production cross sections for W bosons are measured in both the electron and muon decay channels. Differential cross sections for many observables are also presented including measurements of the jet observables such as the rapidities and the transverse momenta as well as measurements of event observables such as the scalar sums of the transverse momenta of the jets. As a result, the measurements are compared to numerous QCD predictions including next-to-leading-order perturbative calculations, resummation calculations and Monte Carlo generators.
Book Synopsis Top Quark Physics at Hadron Colliders by : Arnulf Quadt
Download or read book Top Quark Physics at Hadron Colliders written by Arnulf Quadt and published by Springer Science & Business Media. This book was released on 2007-08-16 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This will be a required acquisition text for academic libraries. More than ten years after its discovery, still relatively little is known about the top quark, the heaviest known elementary particle. This extensive survey summarizes and reviews top-quark physics based on the precision measurements at the Fermilab Tevatron Collider, as well as examining in detail the sensitivity of these experiments to new physics. Finally, the author provides an overview of top quark physics at the Large Hadron Collider.
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