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CERN Document Server 2,046 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 1.59 δευτερόλεπτα. 
1.
(100)
Search for excited leptons in $e^{+} e^{-}$ annihilation at $\sqrt {s}$ = 130 - 140 GeV / L3 Collaboration
We report on a search for the excited leptons e^*,mu^*,tau^* and nu^* in e+e- collisions at sqrt{s} = 130 - 140 GeV using the L3 detector at LEP. No evidence has been found for their existence. [...]
CERN-PPE-95-190; CERN-L3-092.- Geneva : CERN, 1996 - 16 p. - Published in : Phys. Lett. B 370 (1996) 211-221 Fulltext: PDF;
In : 9th Annual Meeting of the Division of Particles and Fields of the American Physical Society, v.1-2, Minneapolis, MN, USA, 11 - 15 Aug 1996, pp.296-300 (short version) - Please contact the library if you need to access this document.
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2.
(91)
Search for Excited Leptons in $e^+ e^-$ Annihilation at $\sqrt{s}$ = 161 GeV / L3 Collaboration
A search for excited leptons $\rm e^*,~\mu^*, ~\tau^*$ and $\nu_{\rm e}^*$ in $\rm e^+e^-$ collisions at $\rm \sqrt{s}$ = 161 GeV is performed using the $\rm 10.8 ~pb^{-1}$ of data collected by the L3 detector at LEP. No evidence has been found for their existence. [...]
CERN-PPE-97-012; CERN-L3-110.- Geneva : CERN, 1997 - 15 p. - Published in : Phys. Lett. B 401 (1997) 139-149 Fulltext: PDF; - Please contact the library if you need to access this document.
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3.
(76)
Neutral-Current Four-Fermion Production in $e^+ e^-$ Interactions at 130 GeV $\leq \sqrt{s} \leq$ 172 GeV / L3 Collaboration
A study of neutral-current four-fermion processes is performed, using data collected by the L3 detector at LEP during high-energy runs at centre-of-mass energies 130 - 136, 161 and 170 - 172 GeV, with integrated luminosities of 4.9, 10.7 and 10.1 pb$^{-1}$, respectively. The total cross sections for the final states $ \ell\ell \ell^\prime \ell^\prime $ and $\rm \ell\ell qq $ ($\ell$,~$\ell^\prime $ = e, $\mu$ or $\tau$) are measured and found to be in agreement with the Standard Model prediction..
CERN-PPE-97-106; CERN-L3-132.- Geneva : CERN, 1997 - 13 p. - Published in : Phys. Lett. B 413 (1997) 191-200 Fulltext: PDF; - Please contact the library if you need to access this document.
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4.
(74)
Search for charged Higgs bosons in $e^+ e^-$ collisions at centre-of-mass energies between 130 and 183 GeV / L3 Collaboration
A search for pair-produced charged Higgs bosons is performed with the L3 detector at LEP using data collected at centre-of-mass energies from \mbox{130 to 183 \GeV{}}, corresponding to an integrated luminosity of 88.3 \pb. The Higgs decays into a charm and a strange quark or into a tau lepton and its associated neutrino are considered. [...]
CERN-EP-98-149; CERN-L3-161.- Geneva : CERN, 1999 - 14 p. - Published in : Phys. Lett. B 446 (1999) 368-377 Fulltext: PDF; - Please contact the library if you need to access this document.
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5.
(71)
Cross-Section of Hadron Production in $\gamma\gamma$ Collisions at LEP / L3 Collaboration
The reaction $\mathrm{e}^{+} \mathrm{e}^{-} \rightarrow \mathrm{e}^{+} \mathrm{e}^{-} \gamma ^{*} \gamma ^{*} \rightarrow \mathrm{e}^{+} \mathrm{e}^{-} $ {\sl hadrons} is analysed using data collected by the L3 detector during the LEP runs at $\sqrt {s}$ = 130-140 GeV and $\sqrt {s}$ = 161 GeV. The cross sections $\sigma(\mathrm{e}^{+} \mathrm{e}^{-} \rightarrow \mathrm{e}^{+} \mathrm{e}^{-} $ {\sl hadrons}) and $\sigma (\gamma\gamma \rightarrow $ {\sl hadrons}) are measured in the interval 5 $\leq W_{\gamma\gamma} \leq$ 75 GeV [...]
CERN-PPE-97-048; CERN-L3-116.- Geneva : CERN, 1997 - 19 p. - Published in : Phys. Lett. B 408 (1997) 450-464 Fulltext: PDF;
In : 7th International Workshop on Deep Inelastic Scattering and QCD, Zeuthen, Germany, 19 - 23 Apr 1999, pp.283-286 - Please contact the library if you need to access this document.
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6.
(71)
Single and multi-photon events with missing energy in $e^+ e^-$ collisions at 161 GeV < $\sqrt{s}$ < 172 GeV / L3 Collaboration
A search for single and multi-photon events with missing energy is performed using data collected at centre-of-mass energies between 161 GeV and 172 GeV for a total of 20.9 pb$^{-1}$ of integrated luminosity. The results obtained are used to derive the value for the $\nu\bar{\nu}\gamma(\gamma)$ cross section as well as upper limits on new physics processes..
CERN-PPE-97-076; CERN-L3-124.- Geneva : CERN, 1997 - 19 p. - Published in : Phys. Lett. B 415 (1997) 299-310 Fulltext: PDF; - Please contact the library if you need to access this document.
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7.
(69)
Production of e, $\mu$ and $\tau$ Pairs in Untagged Two-Photon Collisions at LEP / L3 Collaboration
The two-photon collision reaction e+e- --> e+e-l+l- has been studied at root(s) ~ 91 GeV using the L3 detector at LEP for l = e, muon , tau. We have analysed untagged configurations where the two photons are quasi-real. [...]
CERN-PPE-97-043; CERN-L3-113.- Geneva : CERN, 1997 - 18 p. - Published in : Phys. Lett. B 407 (1997) 341-350 Fulltext: PDF; - Please contact the library if you need to access this document.
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8.
(69)
Search for new physics in energetic single photon production in $e^+ e^-$ annihilation at the Z resonance / L3 Collaboration
Using a sample of $\mathrm{e^{+}e^{-}}$ annihilation events collected with the L3 detector at the Z resonance corresponding to an integrated luminosity of 137 pb$^{-1}$, we have searched for anomalous production of $\gamma \mathrm{X}$ final states where $\mathrm{X}$ represents stable, weakly interacting particles and the photon energy is greater than 15 GeV. The sample of events found is consistent with Standard Model expectations. [...]
CERN-PPE-97-082; CERN-L3-128.- Geneva : CERN, 1997 - 13 p. - Published in : Phys. Lett. B 412 (1997) 201-209 Fulltext: PDF; - Please contact the library if you need to access this document.
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9.
(68)
Production of single W bosons in $e^+ e^-$ interactions at $130 \leq \sqrt{s} \leq 183 GeV$ and limits on anomalous $WW\gamma$ couplings / L3 Collaboration
We report on a study of single W boson production in a data sample collected by the L3 detector at centre-of-mass energies from 130 to 183 GeV. The signal consists of large missing energy final states with a single energetic lepton or two hadronic jets. [...]
CERN-EP-98-099; CERN-L3-150.- Geneva : CERN, 1998 - 16 p. - Published in : Phys. Lett. B 436 (1998) 417-427 Fulltext: PDF; - Please contact the library if you need to access this document.
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10.
(67)
Measurement of hadron and lepton-pair production at 130 GeV $<$ $\sqrt{s}$ $<$ 140 GeV at LEP / L3 Collaboration
We report on the first measurements of e+e- annihilations into hadrons and lepton pairs at center-of-mass energies between 130 GeV and 140 GeV. In a total luminosity of 5 pb-1 collected with the L3 detector at LEP we select 1577 hadronic and 401 lepton-pair events. [...]
CERN-PPE-95-191; CERN-L3-090.- Geneva : CERN, 1996 - 27 p. - Published in : Phys. Lett. B 370 (1996) 195-210 Fulltext: PDF; - Please contact the library if you need to access this document.
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