Download or read book Search for Supersymmetry at CDF written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have conducted a search for trilepton events from supersymmetry (SUSY) in p[bar p] collisions at [radical]s = 1.8 TeV. In the Supersymmetric Standard Model (MSSM), trilepton events are expected from chargino-neutralino ([tilde [chi]][sub 1][sup [plus-minus]][tilde [chi]][sub 2][sup [minus]0]) pair production, with subsequent decay into leptons. In all possible combinations of electron and muon channels in 19 pb[sup [minus]1] data, we observe no events which pass our trilepton selection criteria. Employing the GUT hypothesis within the framework of the MSSM, our preliminary excludes M([tilde [chi]][sub 1][sup [plus-minus]])
Download or read book Search for Supersymmetry in pp Collisions at s 8 TeV with a Photon Lepton and Missing Transverse Energy written by Yutaro Iiyama and published by Springer. This book was released on 2017-06-14 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Ph.D. thesis is a search for physics beyond the standard model (SM) of particle physics, which successfully describes the interactions and properties of all known elementary particles. However, no particle exists in the SM that can account for the dark matter, which makes up about one quarter of the energy-mass content of the universe. Understanding the nature of dark matter is one goal of the CERN Large Hadron Collider (LHC). The extension of the SM with supersymmetry (SUSY) is considered a promising possibilities to explain dark matter. The nominated thesis describes a search for SUSY using data collected by the CMS experiment at the LHC. It utilizes a final state consisting of a photon, a lepton, and a large momentum imbalance probing a class of SUSY models that has not yet been studied extensively. The thesis stands out not only due to its content that is explained with clarity but also because the author performed more or less all aspects of the thesis analysis by himself, from data skimming to limit calculations, which is extremely rare, especially nowadays in the large LHC collaborations.
Download or read book Search for Supersymmetry in the Dilepton Final State with Taus at CDF Run II written by and published by . This book was released on 2011 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the results a search for chargino and neutralino supersymmetric particles yielding same signed dilepton final states including one hadronically decaying tau lepton using 6.0 fb-1 of data collected by the the CDF II detector. This signature is important in SUSY models where, at high tan ?, the branching ratio of charginos and neutralinos to tau leptons becomes dominant. We study event acceptance, lepton identification cuts, and efficiencies. We set limits on the production cross section as a function of SUSY particle mass for certain generic models.
Download or read book Search for Supersymmetry Using Rare B s Mu Mu Decays at CDF Run II written by Vyacheslav E. Krutelyov and published by . This book was released on 2005 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for rare B$0\atop{s}$ → [mu]+[mu]- and B$0\atop{d}$ → [mu]+[mu]- decays has been performed in pp collisions at √s = 1.96 TeV using 364 pb-1 of data collected by the CDF II experiment at the Fermilab Tevatron Collider. The rate of each decay is sensitive to contributions from physics beyond the Standard Model (SM). No events pass the optimized selection requirements, consistent with the SM expectation. The resulting upper limits on the branching ratios are B(B$0\atop{s}$ → [mu]+[mu]-)
Download or read book Search for Supersymmetric Particles at CDF written by and published by . This book was released on 1989 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Supersymmetry Using Rare B 0 atop s d u2192 Decays at CDF Run II written by and published by . This book was released on 2005 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for rare B$0top{s}$ → ?+?- and B$0top{d}$ → ?+?- decays has been performed in pp collisions at √s = 1.96 TeV using 364 pb-1 of data collected by the CDF II experiment at the Fermilab Tevatron Collider. The rate of each decay is sensitive to contributions from physics beyond the Standard Model (SM). No events pass the optimized selection requirements, consistent with the SM expectation. The resulting upper limits on the branching ratios are B(B$0top{s}$ → ?+?-) 1.5 × 10sup-7/sup and B(B$0top{d}$ → ?sup+/sup?sup-/sup) 3.8 × 10
Download or read book Search for Supersymmetric Particles at CDF written by and published by . This book was released on 1989 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analyses of events with large unbalanced transverse energy from the 1987 and 1988-89 CDF data runs have set limits on the masses of supersymmetric squarks and gluinos. In a simple model with a stable photino as the lightest supersymmetric particle, the 1987 data with an integrated luminosity of 25.3 nb−1 have excluded at the 90% CL, squarks of mass less than 73 GeV/c2 and gluinos of mass less than 74 GeV/c2. Preliminary results from an analysis of 1 pb−1 of data from the current 1988-89 run imply that the existence of a squark of mass less than 150 GeV/c2 is unlikely. 4 refs., 2 fig., 1 tab.
Download or read book Search for Supersymmetry with Like Sign Lepton Tau Events at CDF written by and published by . This book was released on 2013 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search Supersymmetry in the Dilepton Final State with Taus at CDF Run II written by Robert David Forrest and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the results a search for chargino and neutralino supersymmetric particles yielding same signed dilepton final states including one hadronically decaying tau lepton using 6.0 fb−1 of data collected by the the CDF II detector. This signature is important in SUSY models where, at high tan [beta], the branching ratio of charginos and neutralinos to tau leptons becomes dominant. We study event acceptance, lepton identification cuts, and efficiencies. We set limits on the production cross section as a function of SUSY particle mass for certain generic models.
Download or read book Search for Supersymmetry Using Like sign Dilepton Events at Collider Detector at Fermilab written by James Paul Done and published by . This book was released on 1999 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Supersymmetry Using Rare B0 subscript subscript d to mu mu Decays at CDF Run II written by Vyacheslav Krutelyov and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for rare B0 [subscript]s to [mu][mu]− and B0 [subscript]d to [mu][mu]− decays has been performed in pp̄ collisions at [square root]s = 1.96 TeV using 364 pb−1 of data collected by the CDF II experiment at the Fermilab Tevatron Collider. The rate of each decay is sensitive to contributions from physics beyond the Standard Model (SM). No events pass the optimized selection requirements, consistent with the SM expectation. The resulting upper limits on the branching ratios are [beta](B0 [subscript]s to [mu]+[mu]−)
Download or read book Search for Supersymmetry with Gauge Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present the results of a search for supersymmetry with gauge-mediated breaking and {tilde {chi}}1° → [gamma]{tilde G} in the [gamma][gamma] + missing transverse energy final state. In 2.6 ± 0.2 fb−1 of p{bar p} collisions at √s = 1.96 TeV recorded by the CDF II detector they observe no candidate events, consistent with a standard model background expectation of 1.4 ± 0.4 events. They set limits on the cross section at the 95% C.L. and place the world's best limit of 149 GeV/c2 on the {tilde {chi}}1° mass at [tau]{sub {tilde {chi}}1°} “ 1 ns. They also exclude regions in the {tilde {chi}}1° mass-lifetime plane of [tau]{sub {tilde {chi}}1°} ≈
Download or read book Perspectives On Supersymmetry written by Gordon Kane and published by World Scientific. This book was released on 1998-07-03 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supersymmetry is at an exciting stage of development. It extends the Standard Model of particle physics into a more powerful theory that both explains more and allows more questions to be addressed. Most important, it opens a window for studying and testing fundamental theories at the Planck scale. Experimentally we are finally entering the intensity and energy regions where superpartners are likely to be detected, and then studied. There has been progress in understanding the remarkable physics implications of supersymmetry, including the derivation of the Higgs mechanism, the unification of the Standard Model forces, cosmological connections such as a candidate for the cold dark matter of the universe and the scalar fields that drive inflation and their potential, the relationship to Planck scale theories, and more.While there are a number of reviews and books where the mathematical structure and uses of supersymmetry can be learned, there are few where the particle physics is the main focus. This book fills that gap. It begins with an excellent pedagogical introduction to the physics and methods and formalism of supersymmetry, by S Martin, which is accessible to anyone with a basic knowledge of the Standard Model of particle physics. Next is an overview of open questions by K Dienes and C Kolda, followed by chapters on topics ranging from how to detect superpartners to connections with Planck scale theories, by leading experts.This invaluable book will allow any interested physicist to understand the coming experimental and theoretical progress in supersymmetry, and will also help students and workers to quickly learn new aspects of supersymmetry they want to pursue.
Download or read book Searches for Supersymmetry at the Tevatron written by Marie-Claude Cousinou and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Status of the searches for supersymmetric particles performed by the CDF and D0 collaborations using samples of data from p{bar p} collisions at a center-of-mass energy of 1.96 TeV with an integrated luminosity of {approx} 300 pb{sup -1}.
Download or read book Supersymmetry Searches at the Collider Detector at Fermilab written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This article presents the current experimental results of searches for Supersymmetry (SUSY) at the Collider Detector at Fermilab (CDF), using over 110 pb−1 of proton-antiproton collision data with (square root)s = 1800 GeV collected during the period 1992-1995. Since no signal was found, limits on the production of supersymmetric particles are derived. The prospects for supersymmetry searches at Run II of the Tevatron, that began in March 2001, are also discussed here.
Download or read book Searches for Charged Higgs Bosons and Supersymmetry at CDF written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for SUSY at CDF written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched supersymmetry (SUSY) using trilepton events in p[bar p] collisions at [radical]s = 1.8 TeV. In the Minimal Supersymmetric Standard Model (MSSM), trilepton events are expected from chargino-neutralino ([tilde [chi]][sub 1][sup [plus-minus]][tilde [chi]][sub 2][sup o]) pair production, with subsequent decay into leptons. In all possible combinations of electron and muon channels in 19 pb[sup [minus]1]data, we observe no events which pass our trilepton selection criteria. Assuming the GUT hypothesis within the framework of the MSSM, our preliminary analysis excludes M([tilde [chi]][sub 1][sup [plus-minus]][tilde [chi]][sub 2][sup o])
