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Book A Search for Unstable Heavy Neutral Leptons in Electron positron Annihilations at Center of mass Energies from 50 to 61 4GeV

Download or read book A Search for Unstable Heavy Neutral Leptons in Electron positron Annihilations at Center of mass Energies from 50 to 61 4GeV written by Neil Mark Shaw and published by . This book was released on 1990 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Experimental Studies of Electron positron Annihilation Into Four lepton Final States at Center of mass Energies from 50 to 61 4 Ge V

Download or read book Experimental Studies of Electron positron Annihilation Into Four lepton Final States at Center of mass Energies from 50 to 61 4 Ge V written by Yiu-Hung M. Ho and published by . This book was released on 1990 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Search for Decays of the Z to Unstable Neutral Leptons

Download or read book A Search for Decays of the Z to Unstable Neutral Leptons written by Mary Elizabeth King and published by . This book was released on 1991 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Search for Stable and Long lived Heavy Charged Particles in Electron positron Collisions at Center of Mass Energies from 130 to 209 GeV with the OPAL Detector at LEP

Download or read book Search for Stable and Long lived Heavy Charged Particles in Electron positron Collisions at Center of Mass Energies from 130 to 209 GeV with the OPAL Detector at LEP written by Gabriele Benelli and published by . This book was released on 2003 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book E e Annihilation

    E e Annihilation

    Book Details:
  • Author : Robert N. Cahn
  • Publisher : Addison Wesley Publishing Company
  • Release : 1985
  • ISBN :
  • Pages : 504 pages

Download or read book E e Annihilation written by Robert N. Cahn and published by Addison Wesley Publishing Company. This book was released on 1985 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Search for Neutralions in Electron positron Annihilation at LEP Energies

Download or read book Search for Neutralions in Electron positron Annihilation at LEP Energies written by Anwarul Hasan and published by . This book was released on 1995 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Electrons and Kaons in Charmed Particle Decays Branching Ratio 3 9 to 7 4 GeV

Download or read book Electrons and Kaons in Charmed Particle Decays Branching Ratio 3 9 to 7 4 GeV written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Inclusive studies of the electron content, kaon content, and associated electron-kaon content of the decays of D mesons and other charmed particles produced in electron-positron annihilation are presented. At the psi(3772) resonance the following inclusive branching ratios for D meson decays to charged kaons were measured. Also at the psi(3772) resonance the average semileptonic branching ratio for D° and D decays to electrons has been measured to be .076 +- 028. The average semileptonic branching ratio of charmed particles produced in ee− annihilation at center-of-mass energies from 3.9 to 7.4 GeV is found to be equal within errors to that of the D's. At all energies the electron momentum spectra are consistent with a combination of the decays D .-->. Ke nu and D .-->. K*e nu. 84 references.

Book A Search for Charged and Neutral Heavy Leptons in E E Annihilations at s

Download or read book A Search for Charged and Neutral Heavy Leptons in E E Annihilations at s written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Heavy Leptons in 1986

Download or read book Heavy Leptons in 1986 written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for new leptons beyond the electron, muon, and tau generations is reviewed. Also discussed is an unexplored region in the mass ranges of leptons: small visible energy events in the electron-positron annihilation and close-mass pairs. 18 refs., 4 figs. (LEW).

Book A Search for Displaced Leptons in the ATLAS Detector

Download or read book A Search for Displaced Leptons in the ATLAS Detector written by Lesya Horyn and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for long-lived particles decaying into displaced electrons and/or muons with large impact parameters. This signature provides unique sensitivity to the production of theoretical lepton-partners, sleptons. These particles are a feature of supersymmetric theories, which seek to address unanswered questions in nature. The signature searched for in this thesis is difficult to identify, and in fact, this is the first time it has been probed at the Large Hadron Collider (LHC). It covers a long-standing gap in coverage of possible new physics signatures. This thesis describes the special reconstruction and identification algorithms used to select leptons with large impact parameters and the details of the background estimation. The results are consistent with background, so limits on slepton masses and lifetimes in this model are calculated at 95% CL, drastically improving on the previous best limits from the Large Electron Positron Collider (LEP).

Book Searches for New Phenomena Using Events with Three Or More Charged Leptons in pp Collisions at sqrt s

Download or read book Searches for New Phenomena Using Events with Three Or More Charged Leptons in pp Collisions at sqrt s written by David Ren-Hwa Yu and published by . This book was released on 2015 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents two searches for phenomena beyond the Standard Model using events with three or more charged leptons. The searches are based on 20.3 fb-1 of proton- proton collision data with a center-of-mass energy of √s = 8 TeV collected by the ATLAS detector at the CERN Large Hadron Collider in 2012. The first is a model-independent search for excesses beyond Standard Model expectations in many signal regions. The events are required to have least three charged leptons, of which at least two are electrons or muons, and at most one is a hadronically decaying [tau] lepton. The selected events are categorized based on the flavor and charge of the leptons, and the signal regions are defined using several kinematic variables sensitive to beyond the Standard Model phenomena. The second search looks for new heavy leptons decaying resonantly to three electrons or muons, two of which are produced through an intermediate Z boson. The resonant decay produces a narrowly- peaked excess in the trilepton mass spectrum. In both cases, no significant excess beyond Standard Model expectations is observed, and the data are used to set limits on models of new physics. The model-independent trilepton search is used to confront a model of doubly charged scalar particles decaying to e[tau] or [mu][tau], excluding masses below 400 GeV at 95% confidence level. The trilepton resonance search is used to test models of vector-like leptons and the type III neutrino seesaw mechanism. The vector-like lepton model is excluded for most of the mass range 114 GeV - 176 GeV, while the type III seesaw model is excluded for most the mass range 100 GeV - 468 GeV. Both searches also present tools to facilitate reinterpretations in the context of other models predicting the production of three or more charged leptons.