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CERN Document Server Pronađeno je 169 zapisa  1 - 10slijedećikraj  idi na zapis: Pretraživanje je potrajalo 1.92 sekundi 
1.
Measurement of Branching Fractions of $\tau$ Hadronic Decays / L3 Collaboration
Using data collected with the L3 detector at LEP at the Z peak, the branching fractions of the $\tau$ lepton into the hadronic final states, $h^- n\pi^0 \nu(n=0,1,2, >= 3)$ and $h^-h^+h^- n\pi^0 \nu$ where $h^\pm$ denotes a charged hadron, are measured to be .....
CERN-EP-2003-019 ; CERN-L3-270. - 2003. - 17 p.
Fulltext - Fulltext
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2.
Inclusive $D^{*\pm}$ production in two-photon collisions at LEP / L3 Collaboration
Inclusive D*/sup +or-/ production in two-photon collisions is studied with the L3 detector at LEP, using 683 pb/sup -1/ of data collected at centre-of-mass energies from 183 to 209 GeV. Differential cross sections are determined as functions of the transverse momentum and pseudorapidity of the D*/sup +or-/ mesons in the kinematic region 1 GeV<P/sub T/<12 GeV and $\beta$ <1.4. [...]
2002 - Published in : Phys. Lett. B 535 (2002) 59-69
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3.
Chargino-pair productions via Drell-Yan process at the LHC / Zhou Hong ; Ma Wen Gan ; Han Liang ; Jiang Yi ; Zhou Mian Lai
We present the analytical and numerical investigations of chargino- pair productions via Drell-Yan process at proton-proton collider in the frame of minimal supersymmetric extension at tree level. For the chi /sub i//sup -/ chi /sub j//sup -/(i, j=1, 2) pair productions at the LHC, the cross section is in the order of 3~2.5*10/sup -3/ pb. [...]
2000 - Published in : Commun. Theor. Phys. 34 (2000) 669-76
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4.
Single chargino production via gluon-gluon fusion in a supersymmetric theory with an explicit R-parity violation / Wan Lang Hui ; Ma Wen Gan ; Yin Xi ; Jiang Yi ; Han Liang
We studied the production of a single chargino chi /sub 1//sup +or-/ accompanied by a mu /sup +or-/ lepton via gluon-gluon fusion at the LHC. The numerical analysis of their production rates was carried out in the mSUGRA scenario with some typical parameter sets. [...]
2001 - Published in : J. Phys. G 27 (2001) 203-15
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5.
Measurements of the $b\overline{b}$ production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP / L3 Collaboration
The measurements of R/sub b/= sigma (e/sup +/e/sup -/ to bb)/ sigma (e/sup +/e/sup -/ to qq) and of the b quark forward-backward charge asymmetry, A/sub fb//sup b/, at centre-of-mass energies above the Z pole are described. The measurement of R/sub b/ is performed at square root (s) between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. [...]
Geneva : CERN, 2000 - Published in : Phys. Lett. B 485 (2000) 71-84
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6.
Pair production of neutralinos via gluon-gluon collisions / Jiang, Y ; Ma Wen Gan ; Han, L ; Yu Zeng Hei ; Pietschmann, Herbert
The production of a neutralino pair via gluon-gluon fusion is studied in the minimal supersymmetric model (MSSM) at proton-proton colliders. The numerical analysis of their production rates is carried out in the MSUGRA scenario. [...]
2000 - Published in : Phys. Rev. D 62 (2000) 035006/1-6
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7.
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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8.
Pair production of the lightest chargino via gluon-gluon collisions / Ma Wen Gan ; Du, F ; Zhou Mian Lai ; Jiang, Y ; Han, L ; Zhou, H
The production of the lightest chargino pair from gluon-gluon fusion is studied in the minimal supersymmetric standard model (MSSM) at proton-proton colliders. We find that with the chosen parameters, the production rate of the subprocess can be over 2.7 fb when the chargino is Higgsino-like, and the corresponding total cross section in proton-proton colliders can reach 56 fb at the CERN Large Hadron Collider (LHC) in the CP-conserving MSSM. [...]
1999 - Published in : Phys. Rev. D 60 (1999) 115009/1-18
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9.
Hadrons at LEP / L3 Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 333-42
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10.
$\chi_{c2}$ formation in two-photon collisions at LEP / L3 Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 73-82
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