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CERN Document Server 106 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 0.51 secondes. 
1.
Anpassung und Test von Fragmentierungsmodellen mit präzisen Ereignisform- und Einteilchenverteilungen unter besonderer Berücksichtigung von identifizierten Teilchenspektren / Weierstall, Michael
WUB-DIS-95-11 CERN-DELPHI-THESIS-151 ; DELPHI-THESIS-151. - Wuppertal : Wuppertal U., 1995. - 203 p.

Fulltext - Fulltext
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2.
Identified particles in quark and gluon jets / DELPHI Collaboration
A sample of about 1.4 million hadronic \z decays, selected among the data recorded by the DELPHI detector at LEP during 1994, was used to measure for the first time the momentum spectra of \kp, \ko, \p, \l and their antiparticles in gluon and quark jets. As observed for inclusive charged particles, the production spectra of identified particles were found to be softer in gluon jets than in quark jets, with a higher total multiplicity..
CERN-PPE-96-193.- Geneva : CERN, 1997 - 16 p. - Published in : Phys. Lett. B 401 (1997) 118-130 Fulltext: PDF; - CERN library copies
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3.
Search for Neutral Heavy Leptons Produced in Z Decays / DELPHI Collaboration
Weak isosinglet Neutral Heavy Leptons ($\nu_m$) have been searched for using data collected by the DELPHI detector corresponding to $3.3\times 10^{6}$ hadronic~Z$^{0}$ decays at LEP1. Four separate searches have been performed, for short-lived $\nu_m$ production giving monojet or acollinear jet topologies, and for long-lived $\nu_m$ giving detectable secondary vertices or calorimeter clusters. [...]
CERN-PPE-96-195.- Geneva : CERN, 1997 - 27 p. - Published in : Z. Phys. C 74 (1997) 57-71 Fulltext: PDF; - CERN library copies
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4.
Search for the $B_c$ meson / DELPHI Collaboration
constant over the range of predicted $B_c\upm$ lifetimes..
CERN-PPE-96-194.- Geneva : CERN, 1997 - 18 p. - Published in : Phys. Lett. B 398 (1997) 207-222 Fulltext: PDF; - CERN library copies
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5.
Search for Stable Heavy Charged Particles in $e^+ e^-$ Collisions at $\sqrt{s}$ = 130-136, 161 and 172 GeV / DELPHI Collaboration
A search for stable or long-lived heavy charged particles in $e^+e^-$ interactions at energies of 130-136, 161 and 172 GeV has been performed using the data taken by the DELPHI experiment at LEP. The search is based on particle identification provided by the Time Projection Chamber and the Ring Imaging Cherenkov detector. [...]
CERN-PPE-96-188.- Geneva : CERN, 1997 - 18 p. - Published in : Phys. Lett. B 396 (1997) 315-326 Fulltext: PDF; - CERN library copies
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6.
A Measurement of $\alpha_s$ from the Scaling Violation in $e^+ e^-$ Annihilation / DELPHI Collaboration
The hadronic fragmentation functions of the various quark flavours and of gluons are measured in a study of the inclusive hadron production from $\zz$ decays with the DELPHI detector and are compared with the fragmentation functions measured elsewhere at energies between 14 GeV and 91 GeV. A large scaling violation is observed, which is used to extract the strong coupling constant from a fit using a numerical integration of the second order DGLAP evolution equations. [...]
CERN-PPE-96-185.- Geneva : CERN, 1997 - 18 p. - Published in : Phys. Lett. B 398 (1997) 194-206 Fulltext: PDF; - CERN library copies
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7.
Search for excited leptons in $e^+ e^-$ collisions at $\sqrt{s}$ =161 GeV / DELPHI Collaboration
A search with the DELPHI detector at LEP for excited leptons ($e^*$, $\mu^*$, $\tau^*$ and $\nu^*$) decaying through $\gamma$, W or Z transitions is reported. The data used correspond to an integrated luminosity of 10 pb$^{-1}$ at an $e^+e^-$ centre-of-mass energy of 161 GeV. [...]
CERN-PPE-96-169.- Geneva : CERN, 1997 - 22 p. - Published in : Phys. Lett. B 393 (1997) 245-260 Fulltext: PDF; - CERN library copies
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8.
A precise measurement of the $B^{0}_{d}$ meson lifetime using a new technique / DELPHI Collaboration
From data recorded by DELPHI between 1991 and 1994, which correspond to 3.2 million hadronic $\mbox{Z}^0$ decays, a measurement of the $\Bdb$ meson lifetime has been performed based on the inclusive reconstruction of $3520 \pm 150$ semileptonic decays of the type \bc $\Bdb \rightarrow \Dstarp ~X~\ell^-~ \overline{\nu_{\ell}}, $ \ec The result is: \bc $\tau(\Bdb) = 1.537~\pm 0.041 (stat.) \pm 0.039 (syst.) ~\mathrm{ps}$. \ec \noindent The contribution to the systematic uncertainty which depends on external errors is $\pm 0.014~\mathrm{ps}$..
CERN-PPE-96-139.- Geneva : CERN, 1997 - 25 p. - Published in : Z. Phys. C 74 (1997) 19-32
- Published in : Z. Phys. C 75 (1997) 579 (Erratum) - CERN library copies
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9.
An Upper Limit for $Br(Z^0 \rightarrow ggg)$ from Symmetric 3-jet $Z^0$ Hadronic Decays / DELPHI Collaboration
An upper limit for $BR(Z^0\ rightarrow 3g)$ is obtained from a correlation method, which distinguishes statistically between quark and gluon jets by using the difference in their charged particle multiplicity distributions. From the sam020AU LW
CERN-PPE-96-131.- Geneva : CERN, 1996 - 12 p. - Published in : Phys. Lett. B 389 (1996) 405-415 Fulltext: PDF; - CERN library copies
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10.
Measurement of Event Shape and Inclusive Distributions at $\sqrt{s} =$ 130 and 136 GeV / DELPHI Collaboration
%\noindent from the high energy data..
CERN-PPE-96-130.- Geneva : CERN, 1997 - 23 p. - Published in : Z. Phys. C 73 (1997) 229-242 Fulltext: PDF; - CERN library copies
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