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Search For Anomalous Kinematics Of Top Dilepton Events In Proton Anti Proton Collisions At U221as
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Book Synopsis Search for Anomalous Kinematics of Top Dilepton Events in Proton - Anti-proton Collisions at {u221A}s by :
Download or read book Search for Anomalous Kinematics of Top Dilepton Events in Proton - Anti-proton Collisions at {u221A}s written by and published by . This book was released on 2004 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author presents a search for anomalous kinematics of t$ar{t}$ dilepton events in p$ar{p}$ collisions at √s = 1.96 TeV using 193 pb-1 of data collected with the CDF II detector. They developed a new a priori technique designed to silate the subset in a data sample revealing the largest deviation from Standard Model expectations and to quantify the significance of this departure. In the four-variable space considered, no particular subset shows a significant discrepancy and they find that the probability to obtain a data sample less consistent with the Standard Model than what is observed is 1.0-4.5%.
Book Synopsis Search for Anomalous Kinematics of Top Dilepton Events in Proton-antiproton Collisions at [square Root] S by : Andrew Gennadievich Ivanov
Download or read book Search for Anomalous Kinematics of Top Dilepton Events in Proton-antiproton Collisions at [square Root] S written by Andrew Gennadievich Ivanov and published by . This book was released on 2004 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Anomalous Kinematics of Top Dilepton Events in Proton-antiproton Collisions at [square Root] S by : Andrew Gennadievich Ivanov
Download or read book Search for Anomalous Kinematics of Top Dilepton Events in Proton-antiproton Collisions at [square Root] S written by Andrew Gennadievich Ivanov and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Anomalous Kinematics of Top Dilepton Events in Proton - Anti-proton Collisions at S**(1/2) by :
Download or read book Search for Anomalous Kinematics of Top Dilepton Events in Proton - Anti-proton Collisions at S**(1/2) written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a search for anomalous kinematics of t[bar t] dilepton events in p[bar p] collisions at [radical]s = 1.96 TeV using 193 pb[sup -1] of data collected with the CDF II detector. They developed a new a priori technique designed to isolate the subset in a data sample revealing the largest deviation from Standard Model expectations and to quantify the significance of this departure. In the four-variable space considered, no particular subset shows a significant discrepancy and they find that the probability to obtain a data sample less consistent with the Standard Model than what is observed is 1.0-4.5%.
Download or read book Top Physics written by D. Acosta and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for anomalous kinematics of t{bar t} dilepton events in p{bar p} collisions at {radical}s = 1.96 TeV using 193 pb{sup -1} of data collected with the CDF II detector. We developed a new a priori technique designed to isolate the subset in a data sample revealing the largest deviation from standard model (SM) expectations and to quantify the significance of this departure. In the four-variable space considered, no particular subset shows a significant discrepancy and we find that the probability of obtaining a data sample less consistent with the SM than what is observed is 1.0-4.5%.
Book Synopsis A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions At[radical] S by :
Download or read book A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions At[radical] S written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search in p[bar p] collisions at[radical]s= 1.8 TeV for anomalous production of events containing a photon with large transverse energy and a lepton (e or[mu]) with large transverse energy, using 86 pb[sup -1] of data collected at the Collider Detector at Fermilab during the 1994-95 collider run at the Fermilab Tevatron. The presence of large missing transverse energy (E[sub T]), additional photons, or additional leptons in these events is also analyzed. The results are consistent with standard model expectations, with the possible exception of photon-lepton events with large E[sub T], for which the probability of a statistical fluctuation of the standard model expectation up to and above the observed level is 0.7%.
Book Synopsis A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions at [square Root] S by : Jeffrey W. Berryhill
Download or read book A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions at [square Root] S written by Jeffrey W. Berryhill and published by . This book was released on 2000 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proton-antiproton Collider Physics - 8th Topical Workshop by : G Belletini
Download or read book Proton-antiproton Collider Physics - 8th Topical Workshop written by G Belletini and published by World Scientific. This book was released on 1990-07-19 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings presents in a systematic way Top searches, Jets, Gauge Boson production, precision tests of electroweak theory, Ln s Physics, heavy Flavours and exotics. In addition, contributions to the sessions 'News from the World', 'Short term future' and 'Long term future' show the progress of SSC in USA, of LHC at CERN, UNK/VLEPP in USSR together with Perspectives of Hadron Collider Physics.
Book Synopsis Search for New Physics in Same-sign Dilepton Events in Proton-proton Collisions at {u221A}s by :
Download or read book Search for New Physics in Same-sign Dilepton Events in Proton-proton Collisions at {u221A}s written by and published by . This book was released on 2016 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for new physics is performed using events with two isolated same-sign leptons, two or more jets, and missing transverse momentum. The results are based on a sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 2.3 fb1. Multiple search regions are defined by classifying events in terms of missing transverse momentum, the scalar sum of jet transverse momenta, the transverse mass associated with a W boson candidate, the number of jets, the number of b quark jets, and the transverse momenta of the leptons in the event. The analysis is sensitive to a wide variety of possible signals beyond the standard model. No excess above the standard model background expectation is observed. Constraints are set on various supersymmetric models, with gluinos and bottom squarks excluded for masses up to 1300 and 680 GeV, respectively, at the 95% confidence level. Upper limits on the cross sections for the production of two top quark-antiquark pairs (119 fb) and two same-sign top quarks (1.7 pb) are also obtained. Furthermore, selection efficiencies and model independent limits are provided to allow further interpretations of the results.
Book Synopsis Search for Anomalous Production of Photon + Jets + Missing Transverse Energy in Proton-antiproton Collisions at a Center of Mass Energy of 1.96 TeV Using the CDF II Detector by : Samantha K. Hewamanage
Download or read book Search for Anomalous Production of Photon + Jets + Missing Transverse Energy in Proton-antiproton Collisions at a Center of Mass Energy of 1.96 TeV Using the CDF II Detector written by Samantha K. Hewamanage and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A model-independent signature-based search for physics beyond the Standard Model is performed in the photon + jets + missing transverse energy channel in proton-antiproton collisions at a center of mass energy of 1.96 TeV using the CDF II detector. Events with a photon + jets are predicted by the Standard Model and also by many theoretical models beyond the Standard Model. In the Standard Model, the main mechanisms for photon + jets production include quark-antiquark annihilation and quark-gluon scattering. No intrinsic missing transverse energy is present in any of these Standard Model processes. In this search, photon + [greater-than or equal to] 1 jet and photon + [greater-than or equal to] 2 jet events are analyzed with and without a minimum requirement on the missing transverse energy. Numerous mass distributions and kinematic distributions are studied and no significant excess over the background prediction is found. All results indicate good agreement with expectations of the Standard Model.
Book Synopsis Search for New Physics in Dielectron Events in 1.96-TeV Proton - Anti-proton Collisions by : Koji Ikado
Download or read book Search for New Physics in Dielectron Events in 1.96-TeV Proton - Anti-proton Collisions written by Koji Ikado and published by . This book was released on 2004 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have searched for new physics beyond the Standard Model of elementary particle physics in dielectron decay mode at the CDF (Collider Detector at Fermilab) experiment in {bar p}p collisions at {radical}s = 1.96 TeV. The data were collected during the 2002-2003 runs corresponding to an integrated luminosity of 200 pb{sup -1}. Many extensions of the Standard Model have been proposed. Grand Unified Theories (GUT) assumes a larger gauge symmetry group and predict new gauge bosons. GUT has hierarchy problem in it and there have been many attempts to solve the hierarchy problem. Solutions for the hierarchy problem are supersymmetry, technicolor, large extra dimensions, warped extra dimensions and little Higgs models. The authors analyze the differential distribution of dielectron events in terms of their invariant mass and no significant excess is found in very high mass region. They present a 95% confidence level limit on the production cross section times branching ratio for new resonant particles decaying into an electron pair as a function of invariant mass. New resonant particles include new neutral gauge boson Z', Randall-Sundrum graviton, R-parity violating sneutrino, and technicolor particles. They also present limits on the effective Planck scale of large extra dimensions.
Book Synopsis Search for New Physics in the Exclusive Delayed ?+E(t) Final State in Pp Collisions at {u221A}(S) by :
Download or read book Search for New Physics in the Exclusive Delayed ?+E(t) Final State in Pp Collisions at {u221A}(S) written by and published by . This book was released on 2012 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents a search for heavy, long-lived, neutral particles that decay to photons in proton anti-proton collisions with a center of mass energy of 1.96 TeV at the Collider Detector at Fermilab (CDF) experiment. Such particles are typical of models of Gauge Mediated Supersymmetry Breaking (GMSB). We select events with a single photon, missing transverse energy, and little other activity in the detector. We model the photon arrival time for Standard Model and non-collision sources using a data-driven method and consider photons which have a time of arrival at the detector which is significantly delayed relative to predictions. Using 6.3 fb-1 of data collected from December 2004 to June 2010, we observe 322 events in the signal region compared to a background prediction of 287 ± 24 events. While the data are consistently above predictions, we report a model excess with a significance of 1.2 standard deviations from the null hypothesis.
Book Synopsis Search for New Physics in Same-sign Dilepton Events in Proton-proton Collisions at √s by :
Download or read book Search for New Physics in Same-sign Dilepton Events in Proton-proton Collisions at √s written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics of Proton Antiproton Collisions by :
Download or read book The Physics of Proton Antiproton Collisions written by and published by . This book was released on 1991 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper contains information information on: accelerator and detector; QCD studies; studies of the electroweak force; The search for the top quark; [beta] physics at hadron colliders; and the search for exotic objects and prospects for the future.
Book Synopsis Looking for New Physics: Search for Anomalous Gauge Couplings in WW and WZ Production in Lepton + Jet Events in Proton-proton Collisions at 13 TeV with the CMS Experiment by : Muhammad Ansar Iqbal
Download or read book Looking for New Physics: Search for Anomalous Gauge Couplings in WW and WZ Production in Lepton + Jet Events in Proton-proton Collisions at 13 TeV with the CMS Experiment written by Muhammad Ansar Iqbal and published by . This book was released on 2020* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Long-lived Strongly-produced Heavy Particles in Proton-antiproton Collisions at Center-of-mass Energy 630 GeV by : Ira Joseph Kroll
Download or read book A Search for Long-lived Strongly-produced Heavy Particles in Proton-antiproton Collisions at Center-of-mass Energy 630 GeV written by Ira Joseph Kroll and published by . This book was released on 1989 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Gauge Mediated SUSY Breaking in Diphoton Events in Proton Anti-proton Collisions at {u221A}s by :
Download or read book Search for Gauge Mediated SUSY Breaking in Diphoton Events in Proton Anti-proton Collisions at {u221A}s written by and published by . This book was released on 2004 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present the results of a search for anomalous production of diphoton events with large missing transverse energy using the Collider Detector at Fermilab. In 202 pb-1 of p$ar{p}$ collisions at √s = 1.96 TeV they observe no candidate events, with an expected standard model background of 0.27 ± 0.07(stat) ± 0.10(syst) events. The results exclude a lightest chargino of mass less than 167 GeV/c2, and lightest neutralino of 93 GeV/c2 at 95% confidence level in a gauge-mediated supersymmetry-breaking model with a light gravitino.
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