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CERN Document Server Sök i 112 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.54 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.
Measurement of the mass of the W boson in $e^{+}e^{-}$ collisions using the fully leptonic channel / OPAL Collaboration
A novel method of determining the mass of the W boson in the W/sup + /W/sup -/ to l nu l' nu ' channel is presented and applied to 667 pb /sup -1/ of data recorded at center-of-mass energies in the range 183-207 GeV with the OPAL detector at LEP. The measured energies of charged leptons and the results of a new procedure based on an approximate kinematic reconstruction of the events are combined to give: M/sub W/=80.41+or-0.41+or-0.13 geV, where the first error is statistical and the second is systematic. [...]
2003 - Published in : Eur. Phys. J. C 26 (2003) 321-330
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4.
Measurement of the Mass of the W Boson in $e^+ e^-$ collisions using the Fully Leptonic Channel / OPAL Collaboration
A novel method of determining the mass of the W boson in the W+W- -> lnu lnu channel is presented and applied to 667pb^-1 of data recorded at the center-of- mass energies in the range 183-207 GeV with the OPAL detector at LEP. The Measured energies of charged leptons and the results of a new procedure based on an approximate kinematic reconstruction of the events are combined to give: Mw=80.41+-0.41+-0.13 GeV, when the first error is statistical and the second is systematic. [...]
hep-ex/0203026; CERN-EP-2002-022; CERN-EP-2002-022.- Geneva : CERN, 2003 - 23 p. - Published in : Eur. Phys. J. C 26 (2003) 321-330 Fulltext: ep-2002-022 - PDF; arXiv:hep-ex_0203026 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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5.
Measurement of the Hadronic Photon Structure Function $F_{2}^{\gamma}$ at LEP2 ; rev. version / OPAL Collaboration
The hadronic structure of the photon F2gamma is measured as a function of Bjorken x and of the photon virtuality Q2 using deep-inelastic scattering data taken by the OPAL detector at LEP at e+e- centre-of-mass energies from 183 to 209 GeV. Previous OPAL measurements of the x dependence of F2gamma are extended to an average Q2 of =780GeV2 using data in the kinematic range 0.15 < x < 0.98. [...]
hep-ex/0202035; CERN-EP-2002-014; CERN-EP-2002-014.- Geneva : CERN, 2002 - 23 p. - Published in : Phys. Lett. B 533 (2002) 207-222 Fulltext: arXiv:hep-ex_0202035 - PDF; 0202035 - PDF; S0370269302015605 - XML; External link: Preprint - Please contact the library if you need to access this document.
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6.
Search for Leptoquarks in Electron-Photon Scattering at $\sqrt{s_{ee}}$ up to 209 GeV at LEP / OPAL Collaboration
Searches for first generation scalar and vector leptoquarks, and for squarks in R-parity violating SUSY models with the direct decay of the squark into Standard Model particles, have been performed using e+e- collisions collected with the OPAL detector at LEP at e+e- centre-of-mass energies between 189 and 209 GeV. No excess of events is found over the expectation from Standard Model background processes. [...]
hep-ex/0112024; CERN-EP-2001-093; CERN-EP-2001-093.- Geneva : CERN, 2002 - 23 p. - Published in : Phys. Lett. B 526 (2002) 233-246 Fulltext: arXiv:hep-ex_0112024 - PDF; ep-2001-093 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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7.
Search for Doubly Charged Higgs Bosons with the OPAL detector at LEP / OPAL Collaboration
A search for pair-produced doubly charged Higgs bosons has been performed using data samples corresponding to an integrated luminosity of about 614 pb-1 collected with the OPAL detector at LEP at centre-of-mass energies between 189GeV and 209GeV. No evidence for a signal has been observed. [...]
hep-ex/0111059; CERN-EP-2001-082; CERN-EP-2001-082.- Geneva : CERN, 2002 - 19 p. - Published in : Phys. Lett. B 526 (2002) 221-232 Fulltext: arXiv:hep-ex_0111059 - PDF; ep-2001-082 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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8.
Particle multiplicity of unbiased gluon jets from $e^+ e^-$ three-jet events / OPAL Collaboration
The charged particle multiplicities of two- and three-jet events from the reaction e+e- -> Z0 -> hadrons are measured for Z0 decays to light quark (uds) flavors. Using recent theoretical expressions to account for biases from event selection, results corresponding to unbiased gluon jets are extracted over a range of jet energies from about 11 to 30 GeV. [...]
hep-ex/0111013; CERN-EP-2001-076; CERN-EP-2001-076.- Geneva : CERN, 2002 - 34 p. - Published in : Eur. Phys. J. C 23 (2002) 597-613 Fulltext: ep-2001-076 - PDF; arXiv:hep-ex_0111013 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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9.
Search for Yukawa Production of a Light Neutral Higgs Boson at LEP / OPAL Collaboration
Within a Two-Higgs-Doublet Model (2HDM) a search for a light Higgs boson in the mass range of 4-12 GeV has been performed in the Yukawa process e+e- -> b bbar A/h -> b bbar tau+tau-, using the data collected by the OPAL detector at LEP between 1992 and 1995 in e+e- collisions at about 91 GeV centre-of-mass energy. A likelihood selection is applied to separate background and signal. [...]
hep-ex/0111010; CERN-EP-2001-077; CERN-EP-2001-077.- Geneva : CERN, 2002 - 25 p. - Published in : Eur. Phys. J. C 23 (2002) 397-407 Fulltext: ep-2001-077 - PDF; arXiv:hep-ex_0111010 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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10.
Genuine Correlations of Like-Sign Particles in Hadronic $Z^0$ Decays / OPAL Collaboration
Correlations among hadrons with the same electric charge produced in Z0 decays are studied using the high statistics data collected from 1991 through 1995 with the OPAL detector at LEP. Normalized factorial cumulants up to fourth order are used to measure genuine particle correlations as a function of the size of phase space domains in rapidity, azimuthal angle and transverse momentum. [...]
hep-ex/0110051; CERN-EP-2001-070; CERN-EP-2001-070.- Geneva : CERN, 2001 - 26 p. - Published in : Phys. Lett. B 523 (2001) 35-52 Fulltext: arXiv:hep-ex_0110051 - PDF; ep-2001-070 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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