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CERN Document Server 122 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 0.62 sekunder. 
1.
Photon structure functions and azimuthal correlations of lepton pairs in tagged $\gamma\gamma$ collisions / L3 Collaboration
Measurements of the QED structure of the photon based on the reaction ee to ee gamma /sup (*)/(P/sup 2/) gamma *(Q/sup 2/) to ee mu mu are discussed. This review is an update of the discussion of the results on the QED structure of the photon and covers the published measurements of the photon structure functions F/sub 2//sup gamma /, F/sub A//sup gamma / and F/sub B//sup gamma / and of the differential cross-section d sigma /dx for the exchange of two virtual photons. [...]
CERN-EP-98-060; CERN-L3-147.- Geneva : CERN, 1998 - Published in : Phys. Lett. B 438 (1998) 363 Fulltext: PDF; - Please contact the library if you need to access this document.
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2.
Measurement of the Spectroscopy of Orbitally Excited B Mesons at LEP / L3 Collaboration
We measure the masses, decay widths and relative production rate of orbitally excited B mesons using $1.25$ million hadronic Z decays recorded by the L3 detector. B-meson candidates are inclusively reconstructed and combined with charged pions produced at the primary event vertex. [...]
hep-ex/9909018; CERN-EP-99-116; CERN-EP-99-116; CERN-L3-181.- Geneva : CERN, 1999 - 16 p. - Published in : Phys. Lett. B 465 (1999) 323-334 Fulltext: arXiv:hep-ex_9909018 - PDF; ep-99-116 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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3.
A Direct determination of the number of light neutrino families from $e^+ e^- \to$ neutrino antineutrino $\gamma$ at LEP / L3 Collaboration
CERN-L3-035.- Geneva : CERN, 1992 - Published in : Phys. Lett. B 275 (1992) 209-221
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4.
Heavy Quarkonium Production in Z Decays / L3 Collaboration
We report measurements of the inclusive production of heavy quarkonium states in $\mathrm {Z}$ decays based on the analysis of 3.6 million hadronic events collected by the L3 detector at LEP. The measurement of inclusive J production and an improved $95\%$ confidence level upper limit on $\Upsilon$ production are presented [...]
CERN-EP-98-204; CERN-L3-167.- Geneva : CERN, 1999 - 18 p. - Published in : Phys. Lett. B 453 (1999) 94 Fulltext: PDF; - Please contact the library if you need to access this document.
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5.
Measurement of the anomalous magnetic and electric dipole moments of the $\tau$ lepton / L3 Collaboration
CERN-EP-98-045; CERN-L3-144.- Geneva : CERN, 1998 - Published in : Phys. Lett. B 434 (1998) 169-179 Fulltext: PDF; - Please contact the library if you need to access this document.
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6.
Measurement of the $B_{d}^{0}-B_{d}^{0}$ oscillation frequency / L3 Collaboration
1998 - Published in : Eur. Phys. J. C 5 (1998) 195-203
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7.
Measurement of the $e^+ e^- \to Z \to b\overline{b}$ forward-backward asymmetry and the $B^{0}\overline{B}^0$ mixing parameter using prompt leptons / L3 Collaboration
The time-integrated $\mathrm{B}^{0}\bar{\mathrm{B}}^{0}$ mixing parameter and the forward-backward charge asymmetry in the process $\mathrm{e}^{+}\mathrm{e}^{-} \rightarrow \mathrm{b}\bar{\mathrm{b}}$ are measured in hadronic \Z events containing prompt muons or electrons, collected by the L3 experiment in the years 1990 to 1995. The total sample of 3.3 million hadronic $\mathrm{Z}$ events with a mean centre-of-mass energy of 91.26 GeV yields: \begin{eqnarray*} \mbox{$A_{\mathrm{FB}}^{\mathrm{b} }$} & = & 0.0960 \pm 0.0066(stat.) \pm 0.0033(sys.) \,, \\ %corel-6 \mbox{$\chi_{\mathrm{b}}$} & = & 0.1192 \pm 0.0068(stat.) \pm 0.0051(sys.) \, [...]
CERN-EP-98-156; CERN-L3-163.- Geneva : CERN, 1999 - 16 p. - Published in : Phys. Lett. B 448 (1999) 152-162 Fulltext: PDF; - Please contact the library if you need to access this document.
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8.
Measurement of the effective weak mixing angle by jet-charge asymmetry in hadronic decays of the Z boson / L3 Collaboration
The coupling of the Z boson to quarks is studied in a sample of about 3.5 million hadronic Z decays collected by the L3 experiment at LEP from 1991 to 1995. The forward-backward quark charge asymmet ry is measured by means of a jet charge technique [...]
CERN-EP-98-134; CERN-L3-157.- Geneva : CERN, 1998 - 20 p. - Published in : Phys. Lett. B 439 (1998) 225 Fulltext: PDF; - Please contact the library if you need to access this document.
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9.
Upper limit on the lifetime difference of short- and long-lived $B^0_s$ mesons / L3 Collaboration
An upper limit on the lifetime difference of short- and long-lived $\rm B^0_s$ mesons has been obtained using an inclusive bottom hadron sample from 2 million hadronic Z decays collected by the L3 experiment at LEP. A lifetime fit has been performed on data samples separately enriched in neutral and charged b hadrons. [...]
CERN-EP-98-127; CERN-L3-159.- Geneva : CERN, 1998 - 17 p. - Published in : Phys. Lett. B 438 (1998) 417-429 Fulltext: PDF; - Please contact the library if you need to access this document.
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10.
Measurement of the Michel parameters and the average $\tau$-neutrino helicity from $\tau$ decays at LEP / L3 Collaboration
Four of the Michel parameters and the average tau-neutrino helicity have been measured by analysing tau decay spectra in 147 \pb ~of data collected by the L3 detector. The decays \tte, ~\ttm, ~\ttp, ~\ttr ~and their charge conjugates were considered. [...]
CERN-EP-98-123; CERN-L3-156.- Geneva : CERN, 1998 - 15 p. - Published in : Phys. Lett. B 438 (1998) 405 Fulltext: PDF; - Please contact the library if you need to access this document.
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