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CERN Document Server 118 registres trobats  1 - 10següentfinal  anar al registre: La cerca s'ha fet en 0.78 segons. 
1.
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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2.
Quark Pair Production in the OPAL Experiment at LEP2 / Biguzzi, A
Cambridge : Cambridge Univ., 1999 - mult..
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3.
Produzione di mesoni $D^{*\pm}$ nell'esperimento OPAL al LEP / Biguzzi, A
Bologna : Bologna Univ., 1996 - mult..
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4.
Z boson pair production in $e^{+}e^{-}$ collisions at $\sqrt{s}$ = 183 and 189 GeV / OPAL Collaboration
A study of Z boson pair production in e+e- annihilation at center-of-mass energies near 183 GeV and 189 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nu nubar), quark and lepton pairs, (q qbar l+l-, q qbar nu nubar) and the all-hadronic final state (q qbar q qbar) are considered. [...]
hep-ex/0003016; CERN-EP-2000-017; CERN-EP-2000-017.- Geneva : CERN, 2000 - 21 p. - Published in : Phys. Lett. B 476 (2000) 256-72 Fulltext: arXiv:hep-ex_0003016 - PDF; 0003016 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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5.
Measurement of |$V_{cb}$| using $\overline{B}^{0} \to D^{*+}l^{-}\overline{\nu}$ decays / OPAL Collaboration
The magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb has been measured using B0 to D*l nu decays recorded on the Z0 peak using the OPAL detector at LEP. The D* to D0 pi+ decays were reconstructed both in the particular decay modes D0 to K- pi+ and D0 to K- pi+ pi- and via an inclusive technique [...]
hep-ex/0003013; CERN-EP-2000-032; OPAL-PR-305; CERN-EP-2000-032; OPAL-PR-305.- Geneva : CERN, 2000 - 21 p. - Published in : Phys. Lett. B 482 (2000) 15-30 Fulltext: arXiv:hep-ex_0003013 - PDF; 0003013 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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6.
Measurements of the QED structure of the photon / Abbiendi, G ; Ackerstaff, K ; Alexander, Gideon ; Allison, J ; Altekamp, N ; Anderson, K J ; Anderson, S ; Arcelli, S ; Asai, S ; Ashby, S F et al.
Geneva : CERN, 1999 - Published in : Eur. Phys. J. C 11 (1999) 409-25
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7.
Transverse and Longitudinal Bose Einstein Correlations in hadronic $Z^0$ Decays / OPAL Collaboration
Bose-Einstein correlations in pairs of identical charged pions produced in asample of 4.3 million Z0 hadronic decays are studied as a function of the threecomponents of the momentum difference, transverse ("out" and "side") andlongitudinal with respect to the thrust direction of the event. A significantdifference between the transverse, r_t_side, and longitudinal, r_l, dimensionsis observed, indicating that the emitting source of identical pions, asobserved in the Longitudinally CoMoving System, has an elongated shape. [...]
hep-ex/0002062; CERN-EP-2000-004; CERN-EP-2000-004.- Geneva : CERN, 2000 - 19 p. - Published in : Eur. Phys. J. C 16 (2000) 423-433 Fulltext: 0002062 - PDF; arXiv:hep-ex_0002062 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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8.
Measurements of $R_{b}$, $A_{FB}^{b}$ and $A_{FB}^{c}$ in $e^{+}e^{-}$ Collisions at 130-189 GeV / OPAL Collaboration
The cross-section ratio Rb=sigma(e+e- to b-antib)/sigma(e+e- to q-antiq) andthe bottom and charm forward-backward asymmetries AFB^b and AFB^c are measuredusing event samples collected by the OPAL detector at centre-of-mass energiesbetween 130 and 189 GeV. Events with bottom quark production are selected witha secondary vertex tag, and a hemisphere charge algorithm is used to extractAFB^b. [...]
hep-ex/0002024; CERN-EP-99-170; CERN-EP-99-170.- Geneva : CERN, 2000 - 36 p. - Published in : Eur. Phys. J. C 16 (2000) 41-60 Fulltext: 0002024 - PDF; arXiv:hep-ex_0002024 - PDF; External link: hep-ex/0002024 PDF - Please contact the library if you need to access this document.
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9.
QCD studies with $e^{+}e^{-}$ annihilation data at 172-189 GeV / OPAL Collaboration
We have studied hadronic events from e+e- annihilation data at centre-of-mass energies of sqrt{s}=172, 183 and 189 GeV. The total integrated luminosity of the three samples, measured with the OPAL detector, corresponds to 250 pb^-1. [...]
hep-ex/0002012; CERN-EP-99-178; CERN-EP-99-178.- Geneva : CERN, 2000 - 49 p. - Published in : Eur. Phys. J. C 16 (2000) 185-210 Fulltext: 0002012 - PDF; arXiv:hep-ex_0002012 - PDF; External link: Rivet analyses reference - Please contact the library if you need to access this document.
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10.
Search for new Physics in rare B Decays / OPAL Collaboration
A search for the decay B+- to K+-K+-pi-+ was performed using data collected by the OPAL detector at LEP. These decays are strongly suppressed in the Standard Model but could occur with a higher branching ratio in supersymmetric models, especially in those with R-parity violating couplings. [...]
hep-ex/0002008; CERN-EP-99-179; CERN-EP-99-179.- Geneva : CERN, 2000 - 16 p. - Published in : AIP Conf. Proc. 549 (2000) 609-613 Fulltext: arXiv:hep-ex_0002008 - PDF; cer-002174670 - PDF; External link: Preprint
In : 7th Conference on the Intersections between Particle and Nuclear Physics, Quebec City, Canada, 22 - 28 May 2000, pp.609-613 - Please contact the library if you need to access this document.
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