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CERN Document Server 2,051 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 1.44 secondes. 
1.
(100)
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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2.
(91)
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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3.
(90)
Search for new physics phenomena in fermion-pair production at LEP / L3 Collaboration
The measurements of hadron and lepton--pair production cross sections and lepton--pair forward--backward asymmetries performed with the L3 detector at centre--of--mass energies between 130 GeV and 172 GeV are used to search for new physics phenomena. New physics effects involving four fermion vertices -- contact interactions -- are looked for in all channels. [...]
CERN-EP-98-031; CERN-L3-143.- Geneva : CERN, 1998 - 18 p. - Published in : Phys. Lett. B 433 (1998) 163 Fulltext: PDF; - Please contact the library if you need to access this document.
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4.
(90)
Measurement of hadron and lepton pair production at 161 GeV < $\sqrt{s}$ < 172 GeV at LEP / L3 Collaboration
We report on measurements of $\mathrm{e^+e^-}$ annihilation into hadrons and lepton pairs. The data have been taken with the L3 detector at LEP at centre--of--mass energies between 161~$\mathrm{Ge\kern -0.12em V}$ and 172~$\mathrm{Ge\kern -0.12em V}$ [...]
CERN-PPE-97-052; CERN-L3-117.- Geneva : CERN, 1997 - 24 p. - Published in : Phys. Lett. B 407 (1997) 361-376 Fulltext: PDF; - Please contact the library if you need to access this document.
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5.
(88)
Search for neutral B meson decays to two charged leptons / L3 Collaboration
The decays $\mathrm{B_d^0,\,B_s^0 \rightarrow e^+e^-,\,\mu^+\mu^-,\, e^\pm\mu^\mp}$ are searched for in 3.5 million hadronic ${\mathrm{Z}}$ events, which constitute the full LEP I data sample collected by the L3 detector. No signals are observed, therefore upper limits at the 90\%(95\%) confidence levels are set on the following branching fractions: % \begin{center}% {\setlength{\tabcolsep}{2pt} \begin{tabular}{lccccclcccc}% % Br$({\mathrm{B_d^0 \rightarrow {\mathrm{e^+e^-}}}})$ & $<$ & $1.4(1.8)$ & $\times$ & $ 10^{-5}$; & \hspace*{5mm} & Br$({\mathrm{B_s^0 \rightarrow {\mathrm{e^+e^-}}}})$ & $<$ & $5.4(7.0)$ & $\times$ & $ 10^{-5}$; \\% Br$({\mathrm{B_d^0 \rightarrow \mu^+\mu^-}})$ & $<$ & $1.0(1.4)$ & $\times$ & $ 10^{-5}$; & \hspace*{5mm} & Br$({\mathrm{B_s^0 \rightarrow \mu^+\mu^-}})$ & $<$ & $3.8(5.1)$ & $\times$ & $ 10^{-5}$; \\% Br$({\mathrm{B_d^0 \rightarrow {\mathrm{e^\pm\mu^\mp}}}})$ & $<$ & $1.6(2.0)$ & $\times$ & $ 10^{-5}$; & \hspace*{5mm} & Br$({\mathrm{B_s^0 \rightarrow {\mathrm{e^\pm\mu^\mp}}}})$ & $<$ & $4.1(5.3)$ & $\times$ & $ 10^{-5}$. [...]
CERN-PPE-96-151; CERN-L3-104.- Geneva : CERN, 1997 - 8 p. - Published in : Phys. Lett. B 391 (1997) 474-480 Fulltext: PDF; - Please contact the library if you need to access this document.
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6.
(87)
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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7.
(85)
Search for supersymmetric particles at 130 GeV $<$ $\sqrt{s}$ $<$ 140 GeV at LEP / L3 Collaboration
CERN-PPE-96-029; CERN-L3-095.- Geneva : CERN, 1996 - 22 p. - Published in : Phys. Lett. B 377 (1996) 289-303 Fulltext: PDF; - Please contact the library if you need to access this document.
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8.
(84)
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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9.
(84)
Search for heavy neutral and charged leptons in $e^+ e^-$ annihilation at $\sqrt{s}$ = 161 GeV and $\sqrt{s}$ = 172 GeV / L3 Collaboration
A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons has been made at center-of-mass energies $\sqrt{s}$ = 161 GeV and $\sqrt{s}$ = 172 GeV with the L3 detector at LEP. No evidence for their existence was found. [...]
CERN-PPE-97-075; CERN-L3-123.- Geneva : CERN, 1997 - 19 p. - Published in : Phys. Lett. B 412 (1997) 189-200 Fulltext: PDF; - Please contact the library if you need to access this document.
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10.
(82)
Results from the L3 experiment at LEP / L3 Collaboration
CERN-PPE-93-31; CERN-L3-055.- Geneva : CERN, 1993 - 202 p. - Published in : Phys. Rep. 236 (1993) 1-146 Fulltext: PDF; - Please contact the library if you need to access this document.
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