Results
author = "Alderweireld, T."
A precise measurement of the tau lifetime
Author(s) :
Abdallah, J.
,
Abreu, P.
,
Adam, W.
,
Adzic, P.
,
Albrecht, T.
,
Alderweireld, T.
,
Alemany-Fernandez, R.
,
Allmendinger, T.
Description :
Repository :
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Language(s) :
Undetermined
Determination of the b quark mass at the $M_Z$ scale with the DELPHI detector at LEP
Author(s) :
Abdallah, J.
,
Abreu, P.
,
Adam, W.
,
Adzic, P.
,
Albrecht, T.
,
Alderweireld, T.
,
Alemany-Fernandez, R.
,
Allmendinger, T.
Description :
An experimental study of the normalized three-jet rate of b quark events with respect to light quark events (light= l = u,d,s) has been performed using the CAMBRIDGE and DURHAM jet algorithms. The data used were collected by the DELPHI experiment at LEP on the Z peak from 1994 to 2000. The results a...
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Undetermined
A measurement of the tau hadronic branching ratios
Author(s) :
Abdallah, J.
,
Abreu, P.
,
Adam, W.
,
Adzic, P.
,
Albrecht, T.
,
Alderweireld, T.
,
Alemany-Fernandez, R.
,
Allmendinger, T.
Description :
The exclusive and semi-exclusive branching ratios of the tau lepton hadronic decay modes (h^-nu_tau, h^-pi0nu_tau, h^-pi0pi0nu_tau, h^- >= 2pi0nu_tau, h^- >= 3pi0nu_tau, 2h^-h^+nu_tau, 2h^-h^+pi0nu_tau, 2h^-h^+ >= 2pi0nu_tau, 3h^-2h^+nu_tau and 3h^-2h^+ >= 1pi0nu_tau) were measured with data from th...
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Undetermined
W pair production cross-section and W branching fractions in $e^+ e^-$ interactions at 183 GeV
Author(s) :
Abreu, P.
,
Adam, W.
,
Adye, T.
,
Adzic, P.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G.D.
,
Alemany, R.
,
Allmendinger, T.
Description :
The cross-section for the process $e^+e^-\rightarrow W^+W^-$ has been measured with the data sample collected by DELPHI at an average centre-of-mass energy of 182.65 GeV and corresponding to an integrated luminosity of 53 pb$^{-1}$. Based on the 770 events selected as $WW$ candidates, the cross-sect...
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Language(s) :
Undetermined
Measurements of the leptonic branching fractions of the $\tau$
Author(s) :
Abreu, P.
,
Adam, W.
,
Adye, T.
,
Adzic, P.
,
Azhinenko, I.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G.D.
,
Alemany, R.
Description :
Data collected with the DELPHI detector from 1993 to 1995 combined with previous DELPHI results for data from 1991 and 1992 yield the branching fractions $ B({\tau \rightarrow \mbox{\rm e} \nu \bar{\nu}}) = (17.877 \pm 0.109_{stat} \pm 0.110_{sys} )\% $ and $B({\tau \rightarrow \mu \nu \bar{\nu}}) =...
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Undetermined
Energy dependence of event shapes and of $\alpha_s$ at LEP 2
Author(s) :
Abreu, P.
,
Adam, W.
,
Adye, T.
,
Adzic, P.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G.D.
,
Alemany, R.
,
Allmendinger, T.
Description :
Infrared and collinear safe event shape distributions and their mean values are determined using the data taken at ve di erent centre of mass energies above $M_Z$ with the DELPHI detector at LEP. From the event shapes, the strong coupling $\alpha_s$ is extracted in $O(\alpha^2_s)$, NLLA and a combin...
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Undetermined
Multiplicity fluctuations in one- and two-dimensional angular intervals compared with analytic QCD calculations
Author(s) :
Abreu, P.
,
Adam, W.
,
Adye, T.
,
Adzic, P.
,
Azhinenko, I.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G.D.
,
Alemany, R.
Description :
Multiplicity fluctuations in rings around the jet axis and in off-axis cones have been measured by the DELPHI collaboration in $e^+e^-$ annihilations into hadrons at LEP energies. The measurements are compared with analytical perturbative QCD calculations for the corresponding multiparton system, us...
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Undetermined
Search for charged Higgs bosons at LEP 2
Author(s) :
Abreu, P.
,
Adam, W.
,
Adye, T.
,
Adzic, P.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G.D.
,
Alemany, R.
,
Allmendinger, T.
Description :
A search for pair produced charged Higgs bosons has been performed in the high energy data collected by DELPHI at LEP with $\sqrt{s} =$ 161, 172 and 183~GeV. The analysis uses the $\tau \nu \tau \nu$, $c \bar s \tau \nu$ and $c \bar s \bar c s$ final states and a combination of event shape variables...
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Undetermined
Measurement of the mass of the W boson using direct reconstruction at $\sqrt{s}$ = 183 GeV
Author(s) :
Abreu, P.
,
Adye, T.
,
Adzic, P.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G D.
,
Alemany, R.
,
Allmendinger, T.
,
Allport, P P.
Description :
From data corresponding to an integrated luminosity of $53.5 \, {\mathrm {pb}}^{-1}$ taken during the $183 \, \GeV$ run in 1997, DELPHI has measured the W mass from direct reconstruction of $\WW \rightarrow \ell \bar{\nu} q \bar{q}$ and $\WW \rightarrow q \bar{q}q \bar{q}$ events. Combining these ch...
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Undetermined
Measurement of the rate of $b\overline{b} b\overline{b}$ events in hadronic Z decays and the extraction of the gluon splitting into $b\overline{b}$
Author(s) :
Abreu, P.
,
Adam, W.
,
Adye, T.
,
Adzic, P.
,
Ajinenko, I.
,
Albrecht, Z.
,
Alderweireld, T.
,
Alekseev, G.D.
,
Alemany, R.
,
Allmendinger, T.
Description :
The rate $Z \rightarrow b\overline{b}b\overline{b}$ was measured using about $2 x 10^6$ hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with $y_{min} 0.06$ and a b-tag was required for every jet. The rate was measured to be: $R_{4b} = BR(Z \to b\ov...
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Undetermined