Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Search For Leptophobic Z Bosons Decaying Into Four Lepton Final States In Proton Proton Collisions At Sqrts
Download Search For Leptophobic Z Bosons Decaying Into Four Lepton Final States In Proton Proton Collisions At Sqrts full books in PDF, epub, and Kindle. Read online Search For Leptophobic Z Bosons Decaying Into Four Lepton Final States In Proton Proton Collisions At Sqrts 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 Leptophobic Z' Bosons Decaying Into Four-lepton Final States in Proton-proton Collisions at Sqrt(s) by :
Download or read book Search for Leptophobic Z' Bosons Decaying Into Four-lepton Final States in Proton-proton Collisions at Sqrt(s) written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for heavy narrow resonances decaying into four-lepton final states from cascade decays of a Z' boson has been performed using proton-proton collision data at sqrt(s) = 8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 inverse femtobarns. No excess of events over the standard model background expectation is observed. Upper limits for a benchmark model on the product of cross section and branching fraction for the production of these heavy narrow resonances are presented. The limit excludes leptophobic Z' bosons with masses below 2.5 TeV within the benchmark model. This is the first result to constrain a leptophobic Z' resonance in the four-lepton channel.
Book Synopsis Search for Leptophobic Z′ Bosons Decaying Into Four-lepton Final States in Proton-proton Collisions at √s by :
Download or read book Search for Leptophobic Z′ Bosons Decaying Into Four-lepton Final States in Proton-proton Collisions at √s written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for the Production of ZW and ZZ Boson Pairs Decaying Into Charged Leptons and Jets in Proton-antiproton Collisions at Sqrt[s] by :
Download or read book Search for the Production of ZW and ZZ Boson Pairs Decaying Into Charged Leptons and Jets in Proton-antiproton Collisions at Sqrt[s] written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the production cross section for ZW and ZZ boson pairs in final states with a pair of charged leptons, from the decay of a Z boson, and at least two jets, from the decay of a W or Z boson, using the full sample of proton-antiproton collisions recorded with the CDF II detector at the Tevatron, corresponding to 8.9 fb(̂-1) of integrated luminosity. We increase the sensitivity to vector boson decays into pairs of quarks using a neural network discriminant that exploits the differences between the spatial spread of energy depositions and charged-particle momenta contained within the jet of particles originating from quarks and gluons. Additionally, we employ new jet energy corrections to Monte Carlo simulations that account for differences in the observed energy scales for quark and gluon jets. The number of signal events is extracted through a simultaneous fit to the dijet mass spectrum in three classes of events: events likely to contain jets with a heavy-quark decay, events likely to contain jets originating from light quarks, and events that fail these identification criteria. We determine the production cross section to be 2.5 +2.0 -1.0 pb (
Book Synopsis A Search for Lepton-flavor-violating Decays of the Z Boson Into a Τ-lepton and a Light Lepton with the ATLAS Detector in Proton-proton Collisions at √s by :
Download or read book A Search for Lepton-flavor-violating Decays of the Z Boson Into a Τ-lepton and a Light Lepton with the ATLAS Detector in Proton-proton Collisions at √s written by and published by . This book was released on 2018 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Excited Leptons in Proton-proton Collisions at {u221A}(s) by :
Download or read book Search for Excited Leptons in Proton-proton Collisions at {u221A}(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: Our search for compositeness of electrons and muons is presented using a data sample of proton-proton collisions at a center-of-mass energy of √(s) = 8 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb-1. Excited leptons (l*) produced via contact interactions in conjunction with a standard model lepton are considered, and a search is made for their gauge decay modes. The decays considered are l* →l? and l* → lZ, which give final states of two leptons and a photon or, depending on the Z-boson decay mode, four leptons or two leptons and two jets. The number of events observed in data is consistent with the standard model prediction. Exclusion limits are set on the excited lepton mass, and the compositeness scale L. For the case Ml* = L the existence of excited electrons (muons) is excluded up to masses of 2.45 (2.47) TeV at 95% confidence level. The neutral current decays of excited leptons are considered for the first time, and limits are extended to include the possibility that the weight factors f and f ', which determine the couplings between standard model leptons and excited leptons via gauge mediated interactions, have opposite sign.
Book Synopsis Search for the Lepton Flavor Violating Decay Z-]eu by : Waruna Sri Fernando
Download or read book Search for the Lepton Flavor Violating Decay Z-]eu written by Waruna Sri Fernando and published by . This book was released on 2010 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We present a search for the lepton flavor violating decay Z->eu in proton-proton collisions at a center of mass energy of 7 TeV using approximately 3.1 pb−1 of data recorded with the ATLAS detector at the CERN large hadron collider. Candidate events have two isolated high p[tau] leptons (an electron and a muon), no jets, and little missing transverse energy. We observe no events with eu invariant mass above 60 GeV/c2. This demonstrates that we can suppress the eu background to a negligible level and are sensitive to exotic eu production. We set 95% confidence upper limit on the Z->eu branching ratio of 2.0 x 10−4.
Book Synopsis Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton in Pp Collisions at \(\sqrt{s} by :
Download or read book Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton 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: A search for heavy leptons decaying to a Z boson and an electron or a muon is presented. The search is based on pp collision data taken at \(\sqrt{s}=8 \) TeV by the ATLAS experiment at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 20.3 fb−1. Three high-transverse-momentum electrons or muons are selected, with two of them required to be consistent with originating from a Z boson decay. No significant excess above Standard Model background predictions is observed, and 95% confidence level limits on the production cross section of high-mass trilepton resonances are derived. The results are interpreted in the context of vector-like lepton and type-III seesaw models. For the vector-like lepton model, most heavy lepton mass values in the range 114-176 GeV are excluded. For the type-III seesaw model, most mass values in the range 100-468 GeV are excluded.
Book Synopsis Search for the Lepton Flavor Violating Decay Z Implies Epsilon Mu with the ATLAS Detector by : D. T. Pignotti
Download or read book Search for the Lepton Flavor Violating Decay Z Implies Epsilon Mu with the ATLAS Detector written by D. T. Pignotti and published by . This book was released on 2014 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process Z -> eμ in pp collisions using 20.3 fb^(-1) of data collected at sqrt(s)= 8 TeV. An enhancement in the eμ invariant mass spectrum is searched for at the Z boson mass. The number of Z bosons produced in the data sample is estimated using events of similar topology, Z -> ee and μμ, significantly reducing the systematic uncertainty in the measurement. There is no evidence of an enhancement at the Z boson mass, resulting in an upper limit on the branching fraction, B(Z -> eμ)
Book Synopsis Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton in Pp Collisions at {u221A}s by :
Download or read book Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton in Pp Collisions at {u221A}s written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a search for heavy leptons decaying to a Z boson and an electron or a muon is presented. The search is based on pp collision data taken at √s=8 TeV by the ATLAS experiment at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 20.3 fb−1. Three high-transverse-momentum electrons or muons are selected, with two of them required to be consistent with originating from a Z boson decay. No significant excess above Standard Model background predictions is observed, and 95% confidence level limits on the production cross section of high-mass trilepton resonances are derived. The results are interpreted in the context of vector-like lepton and type-III seesaw models. For the vector-like lepton model, most heavy lepton mass values in the range 114–176 GeV are excluded. For the type-III seesaw model, most mass values in the range 100–468 GeV are excluded.
Book Synopsis Search for W' Decaying to Tau Lepton and Neutrino in Proton-proton Collisions at $\sqrt{s}$ by :
Download or read book Search for W' Decaying to Tau Lepton and Neutrino in Proton-proton Collisions at $\sqrt{s}$ written by and published by . This book was released on 2015 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: We found that the first search for a heavy charged vector boson in the final state with a tau lepton and a neutrino is reported, using 19.7 fb-1 of LHC data at √s = 8 TeV. A signal would appear as an excess of events in kinematic regions where the standard model background is low. No excess is observed. Limits are set on a model in which the W' decays preferentially to fermions of the third generation. Our results substantially extend previous constraints on this model. Masses below 2.0 to 2.7 TeV are excluded, depending on the model parameters. In addition, the existence of a W' boson with universal fermion couplings is excluded at 95% confidence level, for W' masses below 2.7 TeV.
Book Synopsis Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton in Proton-proton at [radical]s by : Liv Wiik-Fuchs
Download or read book Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton in Proton-proton at [radical]s written by Liv Wiik-Fuchs and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Z --] [tau] [tau] Production Cross-section in Proton-proton Collisions at [square Root Of] S by : Justin Griffiths
Download or read book Measurement of the Z --] [tau] [tau] Production Cross-section in Proton-proton Collisions at [square Root Of] S written by Justin Griffiths and published by . This book was released on 2012 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurement of the inclusive cross-section of the Z boson decaying to two tau leptons was measured with the ATLAS detector at the LHC. The data sample in this analysis represents an integrated luminosity of 35 pb ̄1 of proton-proton collisions at a center of mass energy of sqrt(s)=7 TeV. Separate measurements were performed in four decay modes based on how the two tau leptons decay: to hadrons and an electron, to hadrons and a muon, to an electron and a muon, and to two muons. In all four final states, inclusive cross-section measurements were made both in the fiducial region of the ATLAS detector where acceptance is high and in the full phase space, restricted to the mass range of [66, 116] GeV. The measurements from the four individual channels were then combined to yield the combined Z --> [tau] [tau] cross-section of 970 ± 70 (stat.) ± 60 (sys.) ± 30 (lumi.) pb.
Book Synopsis Search for New Resonances Decaying Via WZ to Leptons in Proton{u2013}proton Collisions at $\sqrt S by :
Download or read book Search for New Resonances Decaying Via WZ to Leptons in Proton{u2013}proton Collisions at $\sqrt S written by and published by . This book was released on 2014 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search is performed in proton–proton collisions at √s=8 TeV for exotic particles decaying via WZ to fully leptonic final states with electrons, muons, and neutrinos. The data set corresponds to an integrated luminosity of 19.5 fb-1. No significant excess is observed above the expected standard model background. Upper bounds at 95% confidence level are set on the production cross section of a W' boson as predicted by an extended gauge model, and on the W'WZ coupling. The expected and observed mass limits for a W' boson, as predicted by this model, are 1.55 and 1.47 TeV, respectively. Stringent limits are also set in the context of low-scale technicolor models under a range of assumptions for the model parameters.
Book Synopsis Search for Lepton Flavour Violating Decays of the Higgs Boson to E Tau and E Mu in Proton-proton Collisions at Sqrt(s) by :
Download or read book Search for Lepton Flavour Violating Decays of the Higgs Boson to E Tau and E Mu 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 direct search for lepton flavour violating decays of the Higgs boson (H) in the H to e tau and H to e mu channels is described. The data sample used in the search was collected in proton-proton collisions at sqrt(s)=8 TeV with the CMS detector at the LHC and corresponds to an integrated luminosity of 19.7 inverse femtobarns. No evidence is found for lepton flavour violating decays in either final state. Upper limits on the branching fractions, B(H to e tau)
Book Synopsis Search for Type-III Seesaw Heavy Leptons in Leptonic Final States in Pp Collisions at [square Root]s by : [Study Group] ATLAS Collaboration CERN
Download or read book Search for Type-III Seesaw Heavy Leptons in Leptonic Final States in Pp Collisions at [square Root]s written by [Study Group] ATLAS Collaboration CERN and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to 139fb−1 of integrated luminosity recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. The analysis focuses on final states with three or four electrons or muons from the possible decays of new heavy leptons via intermediate electroweak bosons. No significant deviations above the Standard Model expectation are observed; upper and lower limits on the heavy lepton production cross-section and masses are derived respectively. These results are then combined for the first time with the ones already published by ATLAS using the channel with two leptons in the final state. The observed lower limit on the mass of the type-III seesaw heavy leptons combining two, three and four lepton channels together is 910 GeV at the 95% confidence level
Book Synopsis Search for Displaced Leptons in Proton-proton Collisions at [sqare Root]s by : Bryan Cardwell
Download or read book Search for Displaced Leptons in Proton-proton Collisions at [sqare Root]s written by Bryan Cardwell and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search is presented for new long-lived particles that propagate a measurable distance through the CMS detector before decaying to leptons. The search is performed in 113–118 fb-1 of proton-proton collision data produced by the CERN LHC at a center-of-mass energy of 13 TeV and collected by the CMS detector in 2016, 2017, and 2018. Events are selected with two leptons (an electron and a muon, two electrons, or two muons) that both have transverse impact parameter values between 0.01 and 10 cm. Using transverse impact parameter as the discriminating variable allows for sensitivity to displaced decays without requiring that the leptons form a common vertex. The search is designed to be sensitive to a wide range of new physics models that produce displaced di-lepton final states. The observation is consistent with the background-only hypothesis, and limits are set on the product of the cross-section of top squark pair production and the branching fraction to a lepton and a b or d quark through an R-parity-violating vertex. For a proper decay length hypothesis of 2 cm, top squarks with masses up 1500 GeV are excluded at the 95% confidence level.
Book Synopsis ZZ Production in Proton-proton Collisions at [squareroot of S] by : Nathaniel Bowen Spurgeon Woods
Download or read book ZZ Production in Proton-proton Collisions at [squareroot of S] written by Nathaniel Bowen Spurgeon Woods and published by . This book was released on 2017 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Search for the Production of ZW and ZZ Boson Pairs Decaying Into Charged Leptons and Jets in Proton-antiproton Collisions at Sqrt[s] PDF Online Free](https://books.google.com/books/content/images/frontcover/X477wQEACAAJ?fife=w200-h370)
![Download Search for the Lepton Flavor Violating Decay Z-]eu PDF Online Free](https://books.google.com/books/content/images/frontcover/rrd2AQAACAAJ?fife=w200-h370)
![Download Search for Heavy Lepton Resonances Decaying to a Z Boson and a Lepton in Proton-proton at [radical]s PDF Online Free](https://books.google.com/books/content/images/frontcover/CR3NswEACAAJ?fife=w200-h370)
![Download Measurement of the Z --] [tau] [tau] Production Cross-section in Proton-proton Collisions at [square Root Of] S PDF Online Free](https://books.google.com/books/content/images/frontcover/xSrTnQAACAAJ?fife=w200-h370)
![Download Search for Type-III Seesaw Heavy Leptons in Leptonic Final States in Pp Collisions at [square Root]s PDF Online Free](https://books.google.com/books/content/images/frontcover/QJrNzwEACAAJ?fife=w200-h370)
![Download Search for Displaced Leptons in Proton-proton Collisions at [sqare Root]s PDF Online Free](https://books.google.com/books/content/images/frontcover/lA58zwEACAAJ?fife=w200-h370)
![Download ZZ Production in Proton-proton Collisions at [squareroot of S] PDF Online Free](https://books.google.com/books/content/images/frontcover/bwzqtAEACAAJ?fife=w200-h370)
