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CERN Document Server 195 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 0.69 secondi. 
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.
Investigation of the Decay of Orbitally-Excited B Mesons and First Measurement of the Branching Ratio $BR(B^{*}_{J} \rightarrow B^{*}\pi(X))$ / OPAL Collaboration
From about 4 million hadronic Z decays recorded by the OPAL detector on and near to the Z resonance, we select a sample of more than 570000 inclusively reconstructed B mesons. Orbitally-excited mesons B*J are reconstructed using Bpi+- combinations. [...]
hep-ex/0010031; CERN-EP-2000-125; CERN-EP-2000-125.- Geneva : CERN, 2002 - 47 p. - Published in : Eur. Phys. J. C 23 (2002) 437-54 Fulltext: 0010031 - PDF; arXiv:hep-ex_0010031 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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5.
Production rate of $b\overline{b}$ quark pairs from gluons and $b\overline{b}b\overline{b}$ events in hadronic Z decays / OPAL Collaboration
The rates are measured per hadronic Z decay for gluon splitting to bb(bar) quark pairs, g_bb, and of events containing two bb(bar) quark pairs, g_4b, using a sample of four-jet events selected from data collected with the OPAL detector. Events with an enhanced signal of gluon splitting to bb(bar) quarks are selected if two of the jets are close in phase-space and contain detached secondary vertices [...]
hep-ex/0010029; CERN-EP-2000-123; CERN-EP-2000-123.- Geneva : CERN, 2001 - 23 p. - Published in : Eur. Phys. J. C 18 (2001) 447-460 Fulltext: arXiv:hep-ex_0010029 - PDF; 0010029 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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6.
Measurement of the $B^0$ Lifetime and Oscillation Frequency using $\overline{B}^{0} \to D^{*+}l^{-}\overline{\nu}$ decays / OPAL Collaboration
The lifetime and oscillation frequency of the B0 meson has been measured using B0->D*+l-v decays recorded on the Z0 peak with the OPAL detector at LEP. The D*+ -> D0pi+ decays were reconstructed using an inclusive technique and the production flavour of the B0 mesons was determined using a combination of tags from the rest of the event. [...]
hep-ex/0010013; CERN-EP-2000-090; CERN-EP-2000-90; CERN-EP-2000-090.- Geneva : CERN, 2000 - 18 p. - Published in : Phys. Lett. B 493 (2000) 266 Fulltext: 0010013 - PDF; arXiv:hep-ex_0010013 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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7.
Measurement of triple gauge boson couplings from $W^{+}W^{-}$ production at LEP energies up to 189 GeV / OPAL Collaboration
A measurement of triple gauge boson couplings is presented, based on W-pair data recorded by the OPAL detector at LEP during 1998 at a centre-of-mass energy of 189 GeV with an integrated luminosity of 183 pb^-1. After combining with our previous measurements at centre-of-mass energies of 161-183 GeV we obtain k_g=0.97 +0.20 -0.16, g_1^z=0.991 +0.060 -0.057 and lambda_g=-0.110 +0.058 -0.055, where the errors include both statistical and systematic uncertainties and each coupling is determined by setting the other two couplings to their SM values. [...]
hep-ex/0009022; CERN-EP-2000-114; CERN-EP-2000-114.- Geneva : CERN, 2001 - 28 p. - Published in : Eur. Phys. J. C 19 (2001) 1-14 Fulltext: 0009022 - PDF; arXiv:hep-ex_0009022 - PDF; External link: Preprint
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.e-page 159 - Please contact the library if you need to access this document.
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8.
Measurement of W boson polarisations and CP-violating triple gauge couplings from $W^{+}W^{-}$ production at LEP / OPAL Collaboration
Measurements are presented of the polarisation of W+W- boson pairs produced in e+e- collisions, and of CP-violating WWZ and WWGamma trilinear gauge couplings. The data were recorded by the OPAL experiment at LEP during 1998, where a total integrated luminosity of 183 pb^-1 was obtained at a centre-of-mass energy of 189 GeV. [...]
hep-ex/0009021; CERN-EP-2000-113; CERN-EP-2000-113.- Geneva : CERN, 2001 - 24 p. - Published in : Eur. Phys. J. C 19 (2001) 229-240 Fulltext: arXiv:hep-ex_0009021 - PDF; 0009021 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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9.
A Measurement of the Rate of Charm Production in W Decays / OPAL Collaboration
Using data recorded at centre-of-mass energies around 183 GeV and 189 GeV with the OPAL detector at LEP, the fundamental coupling of the charm quark to the W boson has been studied. The ratio Rc^W = Gamma(W -> cX)/Gamma(W -> hadrons) has been measured from jet properties, lifetime information, and leptons produced in charm decays. [...]
hep-ex/0009020; CERN-EP-2000-100; CERN-EP-2000-100.- Geneva : CERN, 2000 - 19 p. - Published in : Phys. Lett. B 490 (2000) 71-86 Fulltext: 0009020 - PDF; arXiv:hep-ex_0009020 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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10.
$W^{+}W^{-}$ Production Cross Section and W Branching Fractions in $e^{+}e^{-}$ Collisions at 189 GeV / OPAL Collaboration
From a data sample of 183 pb^-1 recorded at a center-of-mass energy of roots = 189 GeV with the OPAL detector at LEP, 3068 W-pair candidate events are selected. Assuming Standard Model W boson decay branching fractions, the W-pair production cross section is measured to be sigmaWW = 16.30 +- 0.34(stat.) +- 0.18(syst.) pb. [...]
hep-ex/0009019; CERN-EP-2000-101; CERN-EP-2000-101.- Geneva : CERN, 2000 - 19 p. - Published in : Phys. Lett. B 493 (2000) 249-265 Fulltext: arXiv:hep-ex_0009019 - PDF; 0009019 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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