Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Search For Stealth Supersymmetry In Events With Jets Either Photons Or Leptons And Low Missing Transverse Momentum In Pp Collisions At 8 Tev
Download Search For Stealth Supersymmetry In Events With Jets Either Photons Or Leptons And Low Missing Transverse Momentum In Pp Collisions At 8 Tev full books in PDF, epub, and Kindle. Read online Search For Stealth Supersymmetry In Events With Jets Either Photons Or Leptons And Low Missing Transverse Momentum In Pp Collisions At 8 Tev ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Search for Stealth Supersymmetry in Events with Jets, Either Photons Or Leptons, and Low Missing Transverse Momentum in Pp Collisions at 8 TeV. by :
Download or read book Search for Stealth Supersymmetry in Events with Jets, Either Photons Or Leptons, and Low Missing Transverse Momentum in Pp Collisions at 8 TeV. written by and published by . This book was released on 2015 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a search for new physics in final states with jets, either photons or leptons, and low missing transverse momentum are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy View the MathML source with the CMS detector in 2012. The integrated luminosity of the sample is 19.7 fb-1. Many models of new physics predict the production of events with jets, electroweak gauge bosons, and little or no missing transverse momentum. Examples include stealth models of supersymmetry (SUSY), which predict a hidden sector at the electroweak energy scale in which SUSY is approximately conserved. Furthermore, the data are used to search for stealth SUSY signatures in final states with either two photons or an oppositely charged electron and muon. No excess is observed with respect to the standard model expectation, and the results are used to set limits on squark pair production in the stealth SUSY framework.
Book Synopsis Search for Supersymmetry with a Photon, a Lepton, and Missing Transverse Momentum in Pp Collisions at $\sqrt{s}$ by :
Download or read book Search for Supersymmetry with a Photon, a Lepton, and Missing Transverse Momentum in Pp Collisions at $\sqrt{s}$ written by and published by . This book was released on 2016 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our search for supersymmetry involving events with at least one photon, one electron or muon, and large missing transverse momentum has been performed by the CMS experiment. The data sample corresponds to an integrated luminosity of 19.7 fb-1 of pp collisions at √ s = 8 TeV, produced at the CERN LHC. No excess of events is observed beyond expectations from standard model processes. The result of the search is interpreted in the context of a general model of gauge-mediated supersymmetry breaking, where the charged and neutral winos are the next-to-lightest supersymmetric particles. Within this model, winos with a mass up to 360 GeV are excluded at the 95% confidence level. Also, two simplified models inspired by gauge-mediated supersymmetry breaking are also examined, and used to derive upper limits on the production cross sections of specific supersymmetric processes.
Book Synopsis Search for Supersymmetry in Events with Soft Leptons, Low Jet Multiplicity, and Missing Transverse Energy in Proton{u2013}proton Collisions at $\sqrt{s}$ by :
Download or read book Search for Supersymmetry in Events with Soft Leptons, Low Jet Multiplicity, and Missing Transverse Energy in Proton{u2013}proton Collisions at $\sqrt{s}$ written by and published by . This book was released on 2016 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented from a search for supersymmetric particles in scenarios with a compressed mass spectrum. The data sample corresponds to 19.7 inverse femtobarns of proton-proton collisions recorded by the CMS experiment at √s = 8 TeV. The search targets top squark ($ ilde{t}$ pair production in scenarios with mass differences ?m = m($ ilde{t}$ – m($ ilde{i}$10) below the W-boson mass and with top-squark decays in the four-body mode ($ ilde{t}$ → blv$ ilde{i}$10), where the ($ ilde{i}$10) is assumed to be the lightest supersymmetric particle (LSP). The signature includes a high transverse momentum (pT) jet associated with initial-state radiation, one or two low-pT leptons, and significant missing transverse energy. The event yields observed in data are consistent with the expected background contributions from standard model processes. Limits are set on the cross section for top squark pair production as a function of the $ ilde{t}$ and LSP masses. Assuming a 100% branching fraction for the four-body decay mode, top-squark masses below 316 GeV are excluded for ?m = 25 GeV at 95% CL. Furthermore, the dilepton data are also interpreted under the assumption of chargino-neutralino production, with subsequent decays to sleptons or sneutrinos. Assuming a difference between the common $ ilde{i}$1+/$ ilde{i}$2+ mass and the LSP mass of 20 GeV and a ?-enriched decay scenario, masses in the range m( $ ilde{i}$1+)
Book Synopsis Search for Supersymmetry with Photons in Pp Collisions at $\sqrt{s}$ by :
Download or read book Search for Supersymmetry with Photons in Pp Collisions at $\sqrt{s}$ written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two searches for physics beyond the standard model in events containing photons are presented. Our data sample used corresponds to an integrated luminosity of 19.7 fb-1 of proton-proton collisions at √s=8 TeV, collected with the CMS experiment at the CERN LHC. The analyses pursue different inclusive search strategies. One analysis requires at least one photon, at least two jets, and a large amount of transverse momentum imbalance, while the other selects events with at least two photons and at least one jet, and uses the razor variables to search for signal events. The background expected from standard model processes is evaluated mainly from data. These results are interpreted in the context of general gauge-mediated supersymmetry, with the next-to-lightest supersymmetric particle either a bino- or wino-like neutralino, and within simplified model scenarios. Upper limits at the 95% confidence level are obtained for cross sections as functions of the masses of the intermediate supersymmetric particles.
Book Synopsis Search for Supersymmetry in Events with a Single Lepton, Jets, and Missing Transverse Momentum Using a Neural Network by : Avishek Chatterjee
Download or read book Search for Supersymmetry in Events with a Single Lepton, Jets, and Missing Transverse Momentum Using a Neural Network written by Avishek Chatterjee and published by . This book was released on 2013 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for supersymmetry in proton-proton collisions at [SQUARE ROOT] s = 7 TeV is presented, focusing on events with a single isolated lepton, energetic jets, and large missing transverse momentum. The analyzed data corresponds to a total integrated luminosity of 4.98 fb[-]1 recorded by the CMS experiment. The search uses an artificial neural network to suppress Standard Model backgrounds, and estimates residual backgrounds using a fully data-driven method. The analysis is performed in both the muon and electron channels, and the combined result is interpreted in terms of limits on the CMSSM parameter space, as well as a simplified model.
Book Synopsis Search for Supersymmetry in Events with a Lepton, a Photon, and Large Missing Transverse Energy in Pp Collisions at Sqrt(s) by :
Download or read book Search for Supersymmetry in Events with a Lepton, a Photon, and Large Missing Transverse Energy in Pp Collisions at Sqrt(s) written by and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search is performed for an excess of events, over the standard model expectations, with a photon, a lepton, and large missing transverse energy in pp collisions at sqrt(s) = 7 TeV. Such events are expected in many new physics models, in particular a supersymmetric theory that is broken via a gauge-mediated mechanism, when the lightest charged and neutral gauginos are mass degenerate. The data sample used in this search corresponds to an integrated luminosity of 35 inverse picobarns collected with the CMS detector at the LHC. No evidence of such an excess above the standard model backgrounds, dominated by W-gamma production, is found. The results are presented as 95% confidence level upper limits on the cross section for a benchmark gauge-mediated scenario, and are then converted into exclusion limits on the squark, gluino, and wino masses.
Book Synopsis Search for Supersymmetry in Proton-proton Collisions at 8 TeV in Events with a Single Lepton, Large Jet Multiplicity, and Multiple B Jets by : Paul B. Geffert
Download or read book Search for Supersymmetry in Proton-proton Collisions at 8 TeV in Events with a Single Lepton, Large Jet Multiplicity, and Multiple B Jets written by Paul B. Geffert and published by . This book was released on 2014 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a search for supersymmetry in events with a single lepton, large jet multiplicity, multiple b jets, and significant transverse momentum imbalance in 19.3 fb-1 of pp collisions at center of mass energy of 8 TeV recorded in 2012 by the Compact Muon Solenoid experiment at the Large Hadron Collider. This signature targets strongly produced massive gluinos which decay through top squarks. The observed yields in the signal regions, spanning a broad range of event kinematics, agree with the Standard Model background predictions, which are obtained with a heavy reliance on data control samples. The results of this search are interpreted as cross section limits in the context of simplified supersymmetric scenarios in which gluinos are pair produced and cascade decay to a four top quark, two lightest neutralino final state. By comparing these limits with gluino pair production cross sections, gluinos with mass less than 1 TeV are excluded for low lightest neutralino masses, largely independent of top squark mass.
Book Synopsis Search for Supersymmetry in Events with One Lepton and Multiple Jets in Proton-proton Collisions at Sqrt(s) by :
Download or read book Search for Supersymmetry in Events with One Lepton and Multiple Jets in Proton-proton Collisions at Sqrt(s) written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for supersymmetry is performed in events with a single electron or muon in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 2.3 inverse femtobarns. Several exclusive search regions are defined based on the number of jets and b-tagged jets, the scalar sum of the jet transverse momenta, and the scalar sum of the missing transverse momentum and the transverse momentum of the lepton. The observed event yields in data are consistent with the expected backgrounds from standard model processes. The results are interpreted using two simplified models of supersymmetric particle spectra, both of which describe gluino pair production. In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event. Gluinos with masses up to 1.6 TeV are excluded for neutralino masses below 600 GeV. In the second model, each gluino decays via a three-body process to two light quarks and a chargino, which subsequently decays to a W boson and a neutralino. The mass of the chargino is taken to be midway between the gluino and neutralino masses. In this model, gluinos with masses below 1.4 TeV are excluded for neutralino masses below 700 GeV.
Book Synopsis Search for Supersymmetry in Pp Collisions at $\sqrt{s}$ by :
Download or read book Search for Supersymmetry in Pp Collisions at $\sqrt{s}$ written by and published by . This book was released on 2014 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are reported from a search for supersymmetry in pp collisions at a center-of-mass energy of 8 TeV, based on events with a single isolated lepton (electron or muon) and multiple jets, at least two of which are identified as b jets. The data sample corresponds to an integrated luminosity of 19.3 inverse femtobarns recorded by the CMS experiment at the LHC in 2012. The search is motivated by supersymmetric models that involve strong-production processes and cascade decays of new particles. The resulting final states contain multiple jets as well as missing transverse momentum from weakly interacting particles. The event yields, observed across several kinematic regions, are consistent with the expectations from standard model processes. Thus the results are interpreted in the context of simplified supersymmetric scenarios with pair production of gluinos, where each gluino decays to a top quark-antiquark pair and the lightest neutralino. For the case of decays via virtual top squarks, gluinos with a mass smaller than 1.26 TeV are excluded for low neutralino masses.
Book Synopsis Search for Supersymmetry in Proton-proton Collisions at 7 TeV in Events with a Single Lepton, B-tagged Jets and Missing Transverse Momentum at the LHC Using Data Collected from the CMS Detector by : Wing Howard To
Download or read book Search for Supersymmetry in Proton-proton Collisions at 7 TeV in Events with a Single Lepton, B-tagged Jets and Missing Transverse Momentum at the LHC Using Data Collected from the CMS Detector written by Wing Howard To and published by . This book was released on 2013 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a search for supersymmetry (SUSY) at the Large Hadron Collider using data collected in Run 2011 at center of mass energy of 7 TeV by the Compact Muon Solenoid detector with an integrated luminosity of 4.98 $fb{-1}$. First, the Large Hadron Collider is briefly described along with the Compact Muon Solenoid detector. Second, the Standard Model of particle physics is described which leads to the motivations for supersymmetry and its description. Finally, a search for supersymmetry in events with a single lepton, 2 b-tagged jets and missing transverse energy is documented in detail. The results are used to predict the yields from the standard model in bins missing transverse energy (\met) and total transverse hadronic energy (HT). Limits are set using these results using a minimal supergravity SUSY model and simplified model spectra SUSY model.
Book Synopsis A Search for Supersymmetry in Events with Jets and Missing Momentum Using Data Collected by the CMS Detector at 13 TeV by : Sam Daniel Mullin
Download or read book A Search for Supersymmetry in Events with Jets and Missing Momentum Using Data Collected by the CMS Detector at 13 TeV written by Sam Daniel Mullin and published by . This book was released on 2016 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: As successful as the Standard Model of particle physics has been it still has several major shortcomings which range from unanswered theoretical questions to a lack of any explanation for observed phenomena such as dark matter. One proposed theory for physics beyond the Standard Model which provides solutions for some of these issues is supersymmetry. This dissertation presents a search for supersymmetry using 2.3 fb -1 of proton-proton collision data. This data was collected at a center-of-mass energy of 13 TeV by the CMS detector at the LHC during 2015. This search focuses on top squark pair production where the produced stops both decay to an all hadronic final state. These decays are characterized by multiple jets and missing transverse momentum. A baseline search region is defined to be sensitive to signal processes which occur at rates many orders of magnitude lower than Standard Model processes. The sensitivity to various signal models is improved by dividing this baseline region into distinct categories. Events with an unreconstructed lepton from leptonic W boson decays constitute the primary background. There are also significant contributions from events where a Z boson decays invisibly to neutrinos especially in bins with higher missing transverse momentum. Events with multijet production where one jet has been severely mis-measured as well as those with a pair of top quarks and an invisibly decaying Z boson also have a small presence in the search region. The contributions from these processes to the search region is estimated using data control regions. No statistically significant deviations from the predicted background yields are observed. The results are interpreted in terms of exclusion limits using the Simplified Model Spectrum framework. Stop and neutralino masses are probed up to 780 GeV and 260 GeV respectively.
Book Synopsis Search for Supersymmetry in Events with Photons and Missing Transverse Energy in Pp Collisions at 13 TeV. by :
Download or read book Search for Supersymmetry in Events with Photons and Missing Transverse Energy in Pp Collisions at 13 TeV. written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a search for new physics in final states with photons and missing transverse energy are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV with the CMS detector in 2015, corresponding to an integrated luminosity of 2.3 inverse femtobarns. Final states with two photons and significant missing transverse energy are used to search for supersymmetric particles in models of supersymmetry (SUSY) with general gauge-mediated (GGM) supersymmetry breaking. No excess is observed with respect to the standard model expectation, and the results are used to set limits on gluino pair production and squark pair production in the GGM SUSY framework. Gluino masses below 1.65 TeV and squark masses below 1.37 TeV are excluded at a 95% confidence level.
Book Synopsis Search for Supersymmetry in Events Containing Light Leptons, Jets and Missing Transverse Momentum in Sqrt{s} by : Manuel Schreyer
Download or read book Search for Supersymmetry in Events Containing Light Leptons, Jets and Missing Transverse Momentum in Sqrt{s} written by Manuel Schreyer and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Supersymmetry, in Events Containing Light Leptons, Jets and Missing Transverse Momentum in √s by : Manuel Schreyer
Download or read book Search for Supersymmetry, in Events Containing Light Leptons, Jets and Missing Transverse Momentum in √s written by Manuel Schreyer and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Supersymmetry in Events with a Z Boson, Jets, and Missing Transverse Energy in Pp Collisions with Sqrt(s) by : Tova Ray Holmes
Download or read book A Search for Supersymmetry in Events with a Z Boson, Jets, and Missing Transverse Energy in Pp Collisions with Sqrt(s) written by Tova Ray Holmes and published by . This book was released on 2016 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for new phenomena in final states containing a Z boson decaying to electrons or muons, jets, and large missing transverse momentum is presented. This search uses proton--proton collision data collected during 2015 and 2016 at a center of mass energy sqrt(s)=13 TeV by the ATLAS detector at the Large Hadron Collider, which correspond to an integrated luminosity of 14.7 fb-1. The search targets the pair production of supersymmetric particles, squarks or gluinos, which decay via jets and a Z boson to the lightest Supersymmetric particle, which does not interact with the ATLAS detector. Results are interpreted in simplified models of gluino-pair (squark-pair) production, and provide sensitivity to gluinos (squarks) with masses as large as 1.3 (1.0) TeV.
Book Synopsis Search for Supersymmetry in Events with Soft Leptons, Low Jet Multiplicity, and Missing Transverse Energy in Proton-proton Collisions at √s by : CMS Collaboration
Download or read book Search for Supersymmetry in Events with Soft Leptons, Low Jet Multiplicity, and Missing Transverse Energy in Proton-proton Collisions at √s written by CMS Collaboration and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Supersymmetry in Events with at Least One Photon and Missing Transverse Momentum in Proton-proton Collisions at a Center-of-mass Energy of 13 TeV at the CMS Experiment by : Johannes Schulz
Download or read book Search for Supersymmetry in Events with at Least One Photon and Missing Transverse Momentum in Proton-proton Collisions at a Center-of-mass Energy of 13 TeV at the CMS Experiment written by Johannes Schulz and published by . This book was released on 2018* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
