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CERN Document Server	Znaleziono 33 rekordów 1 - 10 skocz do rekordu:	Szukanie trwało 1.16 sekund.

Charged-particle multiplicity in $e^+ e^- \rightarrow q \overline{q}$ events at 161 and 172 GeV and from the decay of the W boson / DELPHI Collaboration
The data collected by DELPHI in 1996 have been used to measure the average charged particle multiplicities and dispersions in $q\bar{q}$ events at centre-of-mass energies of $\sqrt{s}=161$~GeV and $\sqrt{s}=172$~GeV, and the average charge multiplicity in WW events at $\sqrt{s}=172$~GeV. The multiplicities in $q\bar{q}$ events are consistent with the evolution predicted by QCD. [...]
CERN-PPE-97-113.- Geneva : CERN, 1998 - 17 p. - Published in : Phys. Lett. B 416 (1998) 233-246 Fulltext: PDF; - CERN library copies

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Search for $B^{0}_s -\overline{B^{0}_s}$ oscillations / DELPHI Collaboration
was obtained by combining the results obtained in three channels..
CERN-PPE-97-114.- Geneva : CERN, 1997 - 23 p. - Published in : Phys. Lett. B 414 (1997) 382-400 Fulltext: PDF; - CERN library copies

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Measurement of the triple gluon vertex from double quark tagged 4-jet events / DELPHI Collaboration
The 4-jet events collected by the DELPHI experiment at LEP1 in 1992, 1993 and 1994 are analysed to determine the contribution of the triple-gluon vertex. Two of the four jets are tagged as jets from $b$- or $c$-quarks using lifetime and lepton transverse momentum information [...]
CERN-PPE-97-112.- Geneva : CERN, 1997 - 22 p. - Published in : Phys. Lett. B 414 (1997) 401-418 Fulltext: PDF; - CERN library copies

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Measurement of the Quark and Gluon Fragmentation Functions in $Z^0$ Hadronic Decays / DELPHI Collaboration
The fragmentation functions and multiplicities in $b\overline{b}$ and light quark events are compared. The measured transverse and longitudinal components of the fragmentation function allow the gluon fragmentation function to be evaluated..
CERN-PPE-97-108.- Geneva : CERN, 1999 - 23 p. - Published in : Eur. Phys. J. C 6 (1999) 19-33 Fulltext: PDF; - CERN library copies

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Search for charginos, neutralinos and gravitinos at LEP / DELPHI Collaboration
An update of the searches for charginos and neutralinos in DELPHI is presented, based mainly on recent data collected at centre-of-mass energies of 161~GeV and 172~GeV. No signal is found. [...]
CERN-PPE-97-107.- Geneva : CERN, 1998 - 37 p. - Published in : Eur. Phys. J. C 1 (1998) 1-20 Fulltext: PDF; - CERN library copies

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Search for neutral and charged Higgs bosons in $e^+ e^-$ collisions at $\sqrt{s}= 161 GeV$ and $172 GeV$ / DELPHI Collaboration
A search for neutral and charged Higgs bosons has been performed in the data collected by the {\sc DELPHI} detector at centre-of-mass energies of 161~GeV and 172~GeV. The analysis assumes either the pair-production of charged Higgs bosons, ${\mathrm H}^{\pm}$, or the production of the lightest neutral Higgs boson, h, with either a Z or a neutral pseudoscalar Higgs boson, A [...]
CERN-PPE-97-085.- Geneva : CERN, 1998 - 68 p. - Published in : Eur. Phys. J. C 2 (1998) 1-37 Fulltext: PDF; - CERN library copies

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Observation of charge ordering in particle production in hadronic $Z^0$ decay / DELPHI Collaboration
Analysis of the rapidity structure of charge correlations in hadronic events from $Z^0$ decays gives evidence for chain-like charge-ordering of particle production along the thrust axis, as predicted by `QCD-motivated' string-like fragmentation models..
CERN-PPE-97-062.- Geneva : CERN, 1997 - 14 p. - Published in : Phys. Lett. B 407 (1997) 174-184 Fulltext: PDF; - CERN library copies

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Measurement of the spin density matrix for the $\rho^0$, $K^{*0}(892)$ and $\phi$ produced in $Z^0$ Decays / DELPHI Collaboration
The spin density matrix elements for the $\rho^0$, K$^{*0}(892)$ and $\phi$ produced in hadronic Z$^0$ decays are measured in the DELPHI detector. There is no evidence for spin alignment of the K$^{*0}(892)$ and $\phi$ in the region $x_p \leq 0.3$ ($x_p = p/p_{beam}$), where $\rho_{00} = 0.33 \pm 0.05$ and $\rho_{00} = 0.30 \pm 0.04$, respectively. [...]
CERN-PPE-97-055.- Geneva : CERN, 1997 - 20 p. - Published in : Phys. Lett. B 406 (1997) 271-286 Fulltext: PDF; - CERN library copies

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Measurement of $B^0_d$ - $\overline B^0_d$ oscillations / DELPHI Collaboration
\Delta m_d = 0.496 \pm 0.034 ~ \mbox{ps}^{-1}..
CERN-PPE-97-051.- Geneva : CERN, 1997 - 41 p. - Published in : Z. Phys. C 76 (1997) 579-598 Fulltext: PDF; - CERN library copies

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A study of the reaction $e^+ e^- \rightarrow \mu^+ \mu^-\gamma_{ISR}$ at LEP and search for new physics at annihilation energies near 80 GeV / DELPHI Collaboration
A study of the channel $e^{+}e^{-}~\rightarrow~\mu^{+}\mu^{-}\gamma_{\ sc ISR}$, where $\gamma_{\sc ISR}$ is an initial state radiation photon, is presented using data collected by the DELPHI experiment from 1991 to 1994. The total cross-section at effective annihilation energies ($\sqrt{s'}$) below the $Z^0$ peak is obtained by using the events with relatively hard initial state radiative photon(s) ($E_{\gamma}~>~$~1~GeV). [...]
CERN-PPE-97-045.- Geneva : CERN, 1997 - 23 p. - Published in : Z. Phys. C 75 (1997) 581-592 Fulltext: PDF; - CERN library copies

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