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CERN Document Server 203 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 1.04 секунд. 
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.
Hadrons at LEP / L3 Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 333-42
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4.
$\chi_{c2}$ formation in two-photon collisions at LEP / L3 Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 73-82
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5.
Study of Neutral-Current Four-Fermion and ZZ Production in $e^+ e^-$ Collisions at $\sqrt{s}$= 183 GeV / L3 Collaboration
Study of Neutral--Current Four--Fermion and ZZ \\ Production in $\rm e^+ e^-$ Collisions at $\rm \sqrt{s}=$ 183 GeV A study of neutral--current four--fermion processes is performed using a data sample corresponding to 55.3~pb$^{-1}$ of integrated luminosity collected by the L3 detector at LEP at an average centre--of--mass energy of $183~\GeV$. The neutral--current four--fermion cross sections for final states with a pair of charged leptons plus jets and with four charged leptons are measured to be consistent with the Standard Model predictions. [...]
CERN-EP-98-206; CERN-L3-169.- Geneva : CERN, 1999 - 23 p. - Published in : Phys. Lett. B 450 (1999) 281-93 Fulltext: PDF; - Please contact the library if you need to access this document.
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6.
Measurement of the cross-section for the process $\gamma^* \gamma^* \to$ hadrons at LEP / L3 Collaboration
Measurements of the two-photon interaction e+e- --> e+e- hadrons at sqrt(s) = 91 GeV and sqrt(s) = 183 GeV are presented. The double-tag events, collected with the L3 detector, correspond to integrated luminosities of 140 pb-1 at 91 GeV and 52 pb-1 at 183 GeV. [...]
CERN-EP-98-205; CERN-L3-168.- Geneva : CERN, 1999 - 16 p. - Published in : Phys. Lett. B 453 (1999) 333-342 Fulltext: PDF; - Please contact the library if you need to access this document.
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7.
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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8.
Inclusive Charm Production in Two-Photon Collisions at LEP / L3 Collaboration
The cross section of charm production in $\mathrm{\gamma \gamma}$ collisions $\mathrm{\sigma (e^+e^- \rightarrow e^+e^-c\bar{c} X)}$ is measured at LEP with the L3 detector at centre of mass energies from 91 GeV to 183 GeV. Charmed hadrons are identified by electrons and muons from semi-leptonic decays. [...]
CERN-EP-98-185; CERN-L3-166.- Geneva : CERN, 2000 - 19 p. - Published in : Nucl. Phys. A 663-664 (2000) 769-72
- Published in : Phys. Lett. B 453 (1999) 83 Fulltext: PDF; - Please contact the library if you need to access this document.
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9.
$\chi_{c2}$ formation in two-photon collisions at LEP ; rev. version / L3 Collaboration
Two-photon formation of the charmonium resonance $\chi_{{\rm c}2}$ has been studied with the L3 detector at LEP. The $\chi_{{\rm c}2}$ is identified through its decay $\chi_{{\rm c}2} \rightarrow \gamma {\rm J}$, with a subsequent decay ${\rm J} \rightarrow {\mathrm{e^+ e^-}}$ or ${\rm J} \rightarrow {\mathrm{\mu^+ \mu^-}}$. [...]
CERN-EP-98-184; CERN-L3-165.- Geneva : CERN, 1999 - 14 p. - Published in : Phys. Lett. B 453 (1999) 73-82 Fulltext: PDF; - Please contact the library if you need to access this document.
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10.
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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