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CERN Document Server Sök i 211 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.52 sekunder. 
1.
Precision electroweak measurements on the $Z$ resonance / ALEPH Collaboration
We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. [...]
hep-ex/0509008; SLAC-R-774; CERN-PH-EP-2005-041; SLAC-R-774; CERN-L3-304.- Geneva : CERN, 2006 - 302 p. ALEPH Papers - Published in : Phys. Rep. 427 (2006) 257 Fulltext: phep-2005-041 - PDF; arXiv:hep-ex_0509008 - PDF; External link: SLAC Document Server
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2.
Measurements of the $b\overline{b}$ production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP / L3 Collaboration
The measurements of R/sub b/= sigma (e/sup +/e/sup -/ to bb)/ sigma (e/sup +/e/sup -/ to qq) and of the b quark forward-backward charge asymmetry, A/sub fb//sup b/, at centre-of-mass energies above the Z pole are described. The measurement of R/sub b/ is performed at square root (s) between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. [...]
Geneva : CERN, 2000 - Published in : Phys. Lett. B 485 (2000) 71-84
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3.
Total Cross Section in $\gamma\gamma$ Collisions at LEP / L3 Collaboration
The reaction e+e- -> e+e- gamma* gamma* -> e+e- hadrons for quasi-real photons is studied using data from root(s) = 183 GeV up to 202 GeV. Results on the total cross sections sigma(e+e- -> e+e- hadrons) and sigma(+e- gamma* gamma* -> e+e- hadrons) are given for the two-photon centre-of-mass energies 5 GeV < Wgammagamma < 185 GeV. [...]
hep-ex/0102025; CERN-EP-2001-012; CERN-EP-2001-012; CERN-L3-235.- Geneva : CERN, 2001 - 17 p. - Published in : AIP Conf. Proc. 571 (2001) 154-159 Fulltext: arXiv:hep-ex_0102025 - PDF; 0102025 - PDF; S0370269301010723 - XML; External link: Preprint
In : Conference on Photon, Ambleside, UK, 26 - 31 Aug 2000, pp.154-159 - Please contact the library if you need to access this document.
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4.
Measurement of the Tau Branching Fractions into Leptons / L3 Collaboration
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated luminosity of 150pb-1, the branching fractions of the tau lepton into electron and muon are measured to be B(tau->e nu nu) = (17.806 +- 0.104 (stat.) +- 0.076 (syst.)) %, B(tau->mu nu nu) = (17.342 +- 0.110 (stat.) +- 0.067 (syst.)) %. From these results the ratio of the charged current coupling constants of the muon and the electron is determined to be g_mu/g_e = 1.0007 +- 0.0051. [...]
hep-ex/0102023; CERN-EP-2001-007; CERN-EP-2001-007; CERN-L3-233.- Geneva : CERN, 2001 - 18 p. - Published in : Phys. Lett. B 507 (2001) 47-60 Fulltext: arXiv:hep-ex_0102023 - PDF; 0102023 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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5.
Study of the $e^+ e^- \to Z\gamma\gamma \to q\overline{q}\gamma\gamma$ Process at LEP / L3 Collaboration
The process e^+e^- -> Z gamma gamma -> q q~ gamma gamma$ is studied in 0.5\,fb-1$ of data collected with the L3 detector at centre-of-mass energies between 130.1 GeV and 201.7 GeV. Cross sections are measured and found to be consistent with the Standard Model expectations. [...]
hep-ex/0102024; CERN-EP-2001-008; CERN-EP-2001-008; CERN-L3-234.- Geneva : CERN, 2001 - 15 p. - Published in : Phys. Lett. B 505 (2001) 47-58 Fulltext: arXiv:hep-ex_0102024 - PDF; ep-2001-008 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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6.
Measurement of the Charm Production Cross Section in gamma gamma Collisions at LEP / L3 Collaboration
Open charm production in gamma-gamma collisions is studied with data collected at e+e- centre-of-mass energies from 189 GeV to 202 GeV corresponding to a total integrated luminosity of 410 pb-1. The charm cross section sigma(gamma gamma ---> c c~ X) is measured for the first time as a function of the two-photon centre-of-mass energy in the interval from 5 GeV to 70 GeV and is compared to NLO QCD calculations..
hep-ex/0101025; CERN-EP-2000-155; CERN-EP-2000-155; CERN-L3-231.- Geneva : CERN, 2001 - 15 p. - Published in : Phys. Lett. B 514 (2001) 19-28 Fulltext: arXiv:hep-ex_0101025 - PDF; 0101025 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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7.
Search for the Standard Model Higgs boson in $e^+ e^-$ collisions at $\sqrt{s}$ up to 202 GeV / L3 Collaboration
The Standard Model Higgs boson is searched for in 233.2 pb-1 of data collected by the L3 detector at centre of mass energies from 192 GeV to 202 GeV. These data are consistent with the expectations of Standard Model processes and no evidence of a Higgs signal is observed. [...]
hep-ex/0012019; CERN-EP-2000-146; CERN-EP-2000-146; CERN-L3-230.- Geneva : CERN, 2001 - 16 p. - Published in : Phys. Lett. B 508 (2001) 225-236 Fulltext: ep-2000-146 - PDF; arXiv:hep-ex_0012019 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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8.
Search for Neutral Higgs Bosons of the Minimal Supersymmetric Standard Model in $e^+ e^-$ Interactions at $\sqrt{s}$=192-202 GeV / L3 Collaboration
A search for the lightest neutral CP-even and the neutral CP-odd Higgs bosons of the Minimal Supersymmetric Standard Model is performed using 233.2 pb-1 of integrated luminosity collected with the L3 detector at LEP at centre-of-mass energies 192-202 GeV. No signal is observed and lower mass limits are given as a function of tan(beta) for two scalar top mixing hypotheses. [...]
hep-ex/0012017; CERN-EP-2000-145; CERN-EP-2000-145; CERN-L3-229.- Geneva : CERN, 2001 - 16 p. - Published in : Phys. Lett. B 503 (2001) 21-33 Fulltext: arXiv:hep-ex_0012017 - PDF; ep-2000-145 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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9.
Measurements of the Cross Sections for Open Charm and Beauty Production in $\gamma\gamma$ Collisions at $\sqrt{s}$ = 189-202 GeV / L3 Collaboration
The production of c and b quarks in gamma-gamma collisions is studied with the L3 detector at LEP with 410 pb^-1 of data, collected at centre-of-mass energies from 189 GeV to 202 GeV. Hadronic final states containing c and b quarks are identified by detecting electrons or muons from their semileptonic decays. [...]
hep-ex/0011070; CERN-EP-2000-144; CERN-EP-2000-144; CERN-L3-226.- Geneva : CERN, 2001 - 17 p. - Published in : Phys. Lett. B 503 (2001) 10-20 Fulltext: 0011070 - PDF; arXiv:hep-ex_0011070 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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10.
Search for Excited Leptons in $e^+ e^-$ Interactions at $\sqrt{s}$=192 - 202 GeV / L3 Collaboration
Excited leptons are searched for using the L3 detector at LEP. The data collected at centre-of-mass energies in the range from 192 up to 202 GeV correspond to a total luminosity of 233 $\rm pb^{-1}$. [...]
hep-ex/0011068; CERN-EP-2000-143; CERN-EP-2000.143; CERN-EP-2000-143; CERN-L3-227.- Geneva : CERN, 2001 - 17 p. - Published in : Phys. Lett. B 502 (2001) 37-50 Fulltext: ep-2000-143 - PDF; arXiv:hep-ex_0011068 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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