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CERN Document Server Sök i 159 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 1.73 sekunder. 
1.
Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP / ALEPH Collaboration
Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3~fb$^{-1}$ collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from $130~GeV$ to $209~GeV$ [...]
arXiv:1302.3415; CERN-PH-EP-2013-022; CERN-PH-EP-2013-022.- Geneva : CERN, 2013 - 126 p. - Published in : Phys. Rep. 532 (2013) 119-244 Draft (restricted): PDF; Fulltext: CERN-PH-EP-2013-022 - PDF; arXiv:1302.3415 - PDF; External link: Preprint
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2.
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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3.
Topologie Hadronischer Ereignisse bei LEP-Energien / Berlich, P
Freiburg im Breisgau : Freiburg Univ., 1990.
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4.
Inklusive Zerfallsgroessen zur Klassifikation von Charm-Ereignissen in Z0-Zerfaellen / Berlich, P
Freiburg im Breisgau : Freiburg Univ., 1997.
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5.
Measurement of the branching fractions and forward-backward asymmetries of the $Z^{0}$ into light quarks / OPAL Collaboration
1997 - Published in : Z. Phys. C 76 (1997) 387-400
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6.
An updated study of B meson oscillations using dilepton events / OPAL Collaboration
This paper reports a study of B meson oscillations using hadronic Z^0 decays with two identified leptons, and updates a previous publication by including data collected in 1994. Decay times are reconstructed for each of the semileptonic B decays by forming vertices which include the lepton and by estimating the B meson momentum. [...]
hep-ex/9707010; CERN-PPE-97-064; CERN-PPE-97-64; CERN-PPE-97-064.- Geneva : CERN, 1997 - 18 p. - Published in : Z. Phys. C 76 (1997) 417-423 Fulltext: arXiv:hep-ex_9707010 - PDF; 9707010 - PDF; External link: hep-ex/9707010 PDF - Please contact the library if you need to access this document.
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7.
Measurement of the branching fractions and forward-backward asymmetries of the $Z^0$ into light quarks / OPAL Collaboration
Using approximately 4.3 million hadronic Z^0 decays collected with the OPAL detector at LEP between 1990 and 1995, we measure the branching fractions of the Z^0 into up-type and down-type light quarks, R_q, and the forward-backward asymmetries, A_FB(q), using high-momentum stable particles as a tag. Adopting a method that employs double tagged events to determine the flavour tagging efficiencies, and assuming the flavour independence of strong interactions and SU(2) isospin symmetry, we measure: R_{d,s}/(R_d + R_u + R_s) = 0.371 +/- 0.016(stat.) +/- 0.016(syst.) and A_FB(d,s) = 0.068 +/- 0.035(stat.) +/- 0.011(syst.), assuming the branching fractions and forward-backward asymmetries of down and strange quarks to be equal. [...]
hep-ex/9707019; CERN-PPE-97-063; CERN-PPE-97-63; CERN-PPE-97-063.- Geneva : CERN, 1997 - 34 p. - Published in : Z. Phys. C 76 (1997) 387-400 Fulltext: 9707019 - PDF; arXiv:hep-ex_9707019 - PDF; External link: hep-ex/9707019 PDF - Please contact the library if you need to access this document.
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8.
An upper limit on the branching ratio for $\tau$ decays into seven charged particles / OPAL Collaboration
We have searched for decays of the tau lepton into seven or more charged particles, using data collected with the OPAL detector from 1990 to 1995 in e^+e^- collisions at sqrt(s) ~ M_Z. No candidate events were found and an upper limit on the branching ratio for tau decays into seven charged particles of 1.8 x 10^-5 at the 95% confidence level was determined..
hep-ex/9707023; CERN-PPE-97-049; CERN-PPE-97-49; CERN-PPE-97-049.- Geneva : CERN, 1997 - 14 p. - Published in : Phys. Lett. B 404 (1997) 213-222 Fulltext: arXiv:hep-ex_9707023 - PDF; 9707023 - PDF; External link: hep-ex/9707023 PDF - Please contact the library if you need to access this document.
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9.
Search for scalar top and scalar bottom quarks at $\sqrt{s}$ = 170 - 172 GeV in $e^+ e^-$ collisions / OPAL Collaboration
CERN-PPE-97-046.- Geneva : CERN, 1997 - 28 p. - Published in : Z. Phys. C 75 (1997) 409-420 External link: Fulltext - CERN library copies
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10.
A study of B meson oscillations using hadronic $Z^0$ decays containing leptons / OPAL Collaboration
An event sample enriched in semileptonic decays of b hadrons is selected using an inclusive lepton selection from approximately 3.0 million hadronic Z^0 decays collected with the OPAL detector. This sample is used to investigate B meson oscillations by reconstructing a proper decay time for the parent of each lepton, using a jet charge method to estimate the production flavour of this parent, and using the lepton charge to tag the decay flavour. [...]
hep-ex/9707009; CERN-PPE-97-036; CERN-PPE-97-36; CERN-PPE-97-036.- Geneva : CERN, 1997 - 36 p. - Published in : Z. Phys. C 76 (1997) 401-415 Fulltext: arXiv:hep-ex_9707009 - PDF; 9707009 - PDF; External link: hep-ex/9707009 PDF - Please contact the library if you need to access this document.
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