Download or read book SEARCH for Chargino and Neutralino Production at s written by G. ALEXANDER and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Chargino Neutralino Production in p bar p Collisions at sqrt s 1 8 TeV written by and published by . This book was released on 1996 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for the existence of the chargino-neutralino (X$~±\atop{1}$X$~0\atop{2}$) pair production predicted by the Minimal Supersymmetric Standard Model(MSSM).
Download or read book Searches for Chargino and Neutralino Production in Multileptonic Final States Using s written by Marco Aparo and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Chargino neutralino Production in P Anti p Collisions at S 1 2 written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search for associated production of the chargino and neutralino supersymmetric particles using up to 1.1 fb−1 of integrated luminosity collected by the CDF II experiment at the Tevatron p{bar p} collider at a center-of-mass energy of 1.96 TeV. The search is conducted by analyzing events with a large transverse momentum imbalance and either three charged leptons or two charged leptons of the same electric charge. The numbers of observed events are found to be consistent with standard model expectations. Upper limits on the production cross section are derived in different theoretical models. In one of these models a lower limit on the mass of the chargino is set at 129 GeV/c2 at the 95% confidence level.
Download or read book Search for Chargino Neutralino Pair Production at CDF written by and published by . This book was released on 2007 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search for associated production of the lightest chargino and next-to-lightest neutralino using 1 fb−1 of (square root)s = 1.96 TeV p{bar p} data collected with the CDF detector at the Tevatron. We combine the results of several multi-lepton final states to set upper limits on the cross section times branching ratio for chargino-neutralino production as a function of the chargino mass.
Download or read book Searches for Chargino and Neutralino Production in Decays to Three lepton Final States Via Intermediate Bosons Using s written by Fabrizio Trovato and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Chargino neutralino Production in P Anti p Collisions at S written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search for associated production of the chargino and neutralino supersymmetric particles using up to 1.1 fb−1 of integrated luminosity collected by the CDF II experiment at the Tevatron p{bar p} collider at a center-of-mass energy of 1.96 TeV. The search is conducted by analyzing events with a large transverse momentum imbalance and either three charged leptons or two charged leptons of the same electric charge. The numbers of observed events are found to be consistent with standard model expectations. Upper limits on the production cross section are derived in different theoretical models. In one of these models a lower limit on the mass of the chargino is set at 129 GeV/c2 at the 95% confidence level.
Download or read book A Search for Associated Chargino neutralino Production in Proton antiproton Collisions at S square Root written by Martin Charles Griffiths and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Chargino and Neutralino Production in the Trilepton Channel with the CDF Run 2 Detector written by Melisa Rossi and published by . This book was released on 2006 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Scalar Top Quarks and Higgsino Like Neutralinos written by Takuya Nobe and published by Springer. This book was released on 2015-11-30 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports a search for theoretically natural supersymmetry (SUSY) at the Large Hadron Collider (LHC). The data collected with the ATLAS detector in 2012 corresponding to 20 /fb of an integrated luminosity have been analyzed for stop pair production in proton–proton collisions at a center-of-mass energy of 8 TeV at the Large Hadron Collider (LHC) in the scenario of the higgsino-like neutralino. The author focuses on stop decaying into a bottom quark and chargino. In the scenario of the higgsino-like neutralino, the mass difference between charginos and neutralinos (Δm) is expected to be small, and observable final-state particles are likely to have low-momentum (soft). The author develops a dedicated analysis with a soft lepton as a probe of particles from chargino decay, which suppresses the large amount of backgrounds. As a result of the analysis, no significant SUSY signal is observed. The 95% confidence-level exclusion limits are set to masses of stop and neutralino assuming Δm = 20 GeV. The region with ΔM (the mass difference between stop and neutralino) 70 GeV is excluded for the first time at stop mass of less than 210 GeV. The author also excludes the signals with ΔM 120 GeV up to 600 GeV of stop mass with neutralino mass of less than 280 GeV. The author clearly shows very few remaining parameter spaces for light stop (e.g., topology of stop decay is extremely similar to the SM top quark) by combining his results and previous ATLAS analyses. His results provide a strong constraint to searches for new physics in the future.
Download or read book Search for Chargino and Neutralino Production in Final States with Two Same sign Leptons Jets and Missing Transverse Momentum at Sqrt s written by 勞卓義 and published by . This book was released on 2019 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Chargino and Neutralino Associated Production at the Tevatron written by Daniela Bortoletto and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author presents a review of the searches for charginos and neutralinos using data from proton-antiproton collision at the center of mass energy of 1.96 TeV collected by the CDF and the D0 experiments at the Tevatron during run II.
Download or read book Search for Charginos Nearly Mass Degenerate with the Lightest Neutralino written by Shingo Kazama and published by Springer. This book was released on 2015-10-22 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the anomaly mediated supersymmetry breaking (AMSB) model is explored by searching for charged winos with their subsequent decays collected with the ATLAS detector at the Large Hadron Collider (LHC). The author develops a new method, called “re-tracking,” to detect charged winos that decay before reaching the Semiconductor Tracker (SCT) detector. Because the nominal tracking algorithm at the ATLAS experiment requires at least seven successive hits in the inner tracking system, the sensitivity to charged winos having a fraction of a nanosecond in the past analysis was therefore limited. However, re-tracking requires a minimum of three pixel hits and provides a fully efficient tracking capability for charged winos traversing the pixel detector, resulting in around about 100 times greater efficiency for charged winos with a lifetime ~0.2 ns longer than that in past searches. Signal topology is characterized by a jet with large transverse momentum (pT), large missing transverse energy, and a high-pT disappearing track. There are three types of back ground tracks: interacting hadron tracks, charged leptons, and tracks with mismeasured pT. A background estimation based on the Monte Carlo (MC) simulation suffers from large uncertainties due to poor statistics and has difficulty simulating the properties of background tracks. Therefore, a data-driven approach has been developed by the author of the book to estimate the background track-pT spectrum. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on the AMSB model are obtained. The author shows that in the AMSB model, a charged wino mass below 270 GeV is excluded at 95 % confidence level, which also directly constrains the mass of wino dark matter.
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 Chargino neutralino Production in P Anti p Collisions at 1 96 TeV with High p T Leptons written by and published by . This book was released on 2007 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a search for the associated production of charginos and neutralinos in p{bar p} collisions at (square root)s = 1.96 TeV. The data were collected at the Collider Detector at Fermilab (CDF II) and correspond to integrated luminosities between 0.7 and 1.0 fb−1. They look for final states with one high-p{sub T} electron or muon, and two additional leptons. The results are consistent with the standard model expectations, and they set limits on the cross section as a function of the chargino mass in three different supersymmetric scenarios. For a specific MSSM scenario with no slepton mixing they set a 95% C.L. limit at 151 GeV/c2.
Download or read book A Search for Chargino neutralino Production at the Fermilab Tevatron Collider written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for evidence of supersymmetry with the Collider Detector at Fermilab using trilepton events in p[anti p] collisions at[radical]s= 1.8 TeV. In the Minimal Supersymmetric Standard Model (MSSM), we expect trilepton events from chargino-neutralino ([tilde[xi]][sup[+-]][sub 1][tilde[xi]][sup 0][sub 2]) pair production, with subsequent decay into leptons. In all possible combinations of electron and muon channels, we observe no candidate events in 107 pb[sup -1] of data. We present limits on chargino and neutralino production within the framework of a supergravity inspired MSSM:[sigma][sub[tilde[xi]][sup[+-]][sub 1][tilde[xi]][sup 0][sub 2]][center-dot] BR([tilde[xi]][sup[+-]][sub 1][tilde[xi]][sup 0][sub 2][yields] 3l+ X)0.34 pb and M[sub[tilde[xi]][sup[+-]][sub 1]] 81.5 GeV/c[sup 2] for tan[beta]= 2, [mu]= -600 GeV/c[sup 2] and M[sub[tilde q]]= M[sub[tilde g]]. We also present limits on a SU(5) x U(1) supergravity model and a 4 and 1/2 parameter Minimal SUGRA model.
Download or read book Search for Chargino neutralino Associated Production Via Trileptonic Final States with DO Detector written by and published by . This book was released on 1996 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results from a search for the production of an associated lightest chargino, W1, and second lightest neutralino, Z2, pair with the D0 detector at Fermilab's pp collider with (square root)s = 1.8 TeV are presented. Based on approximately 85 pb−1 of data collected during the 1993-1995 Tevatron Runs we set a 95% C.L. upper limit on the chargino-neutralino cross section times branching fraction to any trileptonic final state ranging from 0.91 pb to 0.19 pb for wino masses ranging from 45 GeV/c2 to 96 GeV/c2.
