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CERN Document Server 242 Datensätze gefunden  1 - 10nächsteEnde  gehen zum Datensatz: Die Suche hat 0.54 Sekunden gedauert. 
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.
Measurement of the quark to photon fragmentation function through the inclusive production of prompt photons in hadronic $Z^0$ decays / OPAL Collaboration
The inclusive production of prompt photons with energy above 10 GeV is measured using the OPAL detector in hadronic Z^0 decays at LEP. In contrast to previous measurements, the prompt photons were not required to be isolated. [...]
hep-ex/9708020; CERN-PPE-97-086; CERN-PPE-97-86; CERN-PPE-97-086.- Geneva : CERN, 1998 - 24 p. - Published in : Eur. Phys. J. C 2 (1998) 39-48 Fulltext: PDF; External links: Fulltext; Fulltext
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3.
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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4.
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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5.
Search for Single Top Quark Production at LEP2 / OPAL Collaboration
A search for single top quark production via flavour changing neutral currents (FCNC) was performed with data collected by the OPAL detector at the e+e- collider LEP. Approximately 600 pb-1 of data collected at sqrt(s) = 189 - 209 GeV were used to search for the FCNC process e+ e- -> tc(u) -> bWc(u). [...]
hep-ex/0110009; CERN-EP-2001-066; CERN-EP-2001-066.- Geneva : CERN, 2001 - 22 p. - Published in : Phys. Lett. B 521 (2001) 181-194 Fulltext: S0370269301011959 - XML; arXiv:hep-ex_0110009 - PDF; ep-2001-066 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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6.
Measurement of the Hadronic Cross-Section for the Scattering of Two Virtual Photons at LEP / OPAL Collaboration
The interaction of virtual photons is investigated using the reaction e+e- -> e+e- hadrons based on data taken by the OPAL experiment at e+e- centre-of-mass energies sqrt(s_ee)=189-209 GeV, for W>5 GeV and at an average Q^2 of 17.9 GeV^2. The measured cross-sections are compared to predictions of the Quark Parton Model (QPM), to the Leading Order QCD Monte Carlo model PHOJET to the NLO prediction for the reaction e+e- -> e+e-qqbar, and to BFKL calculations. [...]
hep-ex/0110006; CERN-EP-2001-064; CERN-EP-2001-064.- Geneva : CERN, 2001 - 30 p. - Published in : Eur. Phys. J. C 24 (2002) 17-31
- Published in : PoS: hep2001 (2001) , pp. 044 Fulltext: arXiv:hep-ex_0110006 - PDF; ep-2001-064 - PDF; Published version from PoS: hep2001-044 - PDF; hep2001-044_2 - PDF; External link: Preprint
In : International Europhysics Conference on High-Energy Physics, Budapest, Hungary, 12 - 18 Jul 2001, pp.044 - Please contact the library if you need to access this document.
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7.
Measurement of $Z/\gamma^{*}$ production in Compton scattering of quasi-real photons / OPAL Collaboration
The process e+ e- -> e+ e- Z/gamma* is studied with the OPAL detector at LEP at a centre of mass energy of sqrt(s) = 189 GeV. The cross-section times the branching ratio of the Z/gamma* decaying into hadrons is measured within Lorentz invariant kinematic limits to be (1.2 +/- 0.3 +/- 0.1) pb for invariant masses of the hadronic system between 5 GeV and 60 GeV and (0.7 +/- 0.2 +/- 0.1) pb for hadronic masses above 60 GeV. [...]
hep-ex/0107047; CERN-EP-2001-053; CERN-EP-2001-053.- Geneva : CERN, 2002 - 35 p. - Published in : Eur. Phys. J. C 24 (2002) 1-15 Fulltext: arXiv:hep-ex_0107047 - PDF; 0107047 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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8.
Determination of the b Quark Mass at the Z Mass Scale / OPAL Collaboration
In hadronic decays of Z bosons recorded with the OPAL detector at LEP, events containing b quarks were selected using the long lifetime of b flavoured hadrons. Comparing the 3-jet rate in b events with that in d u,s and c quark events, a significant difference was observed. [...]
hep-ex/0105046; CERN-EP-2001-034; CERN-EP-2001-034.- Geneva : CERN, 2001 - 27 p. - Published in : Eur. Phys. J. C 21 (2001) 411-422 Fulltext: 0105046 - PDF; arXiv:hep-ex_0105046 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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9.
Search for Lepton Flavour Violation in $e^+e^-$ Collisions at $\sqrt{s}$ = 189 - 209 GeV / OPAL Collaboration
We search for lepton flavour violating events (e mu, e tau and mu tau) that could be directly produced in e+e- annihilations, using the full available data sample collected with the OPAL detector at centre-of-mass energies between 189 GeV and 209 GeV. In general, the Standard Model expectations describe the data well for all the channels and at each sqrt(s). [...]
hep-ex/0109011; CERN-EP-2001-061; CERN-EP-2001-061.- Geneva : CERN, 2001 - 16 p. - Published in : Phys. Lett. B 519 (2001) 23-32 Fulltext: S0370269301010863 - XML; arXiv:hep-ex_0109011 - PDF; 0109011 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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10.
Measurement of the Branching Ratio for the Process $b \to \tau^{-}\overline{\nu}_{\tau}X$ / OPAL Collaboration
The inclusive branching ratio for the process b -> tau nu X has been measured using hadronic Z decays collected by the OPAL experiment at LEP in the years 1992-2000. The result is: BR(b -> tau nu X) = (2.78 +/- 0.18 +/- 0.51)% This measurement is consistent with the Standard Model expectation and puts a constraint of tan(beta) / M(H+/-) < 0.53 GeV-1 at the 95% confidence level on Type II Two Higgs Doublet Models..
hep-ex/0108031; CERN-EP-2001-058; CERN-EP-2001-058.- Geneva : CERN, 2001 - 18 p. - Published in : Phys. Lett. B 520 (2001) 1-10 Fulltext: 0108031 - PDF; S0370269301010127 - XML; arXiv:hep-ex_0108031 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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CERN Document Server : 242 Datensätze gefunden   1 - 10nächsteEnde  gehen zum Datensatz:
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7 Long, G
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