author = "Alderweireld, T."

Found 106 documents, displaying page 6 of 11

## A precise measurement of the tau lifetime

Description :
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## Determination of the b quark mass at the $M_Z$ scale with the DELPHI detector at LEP

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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## A measurement of the tau hadronic branching ratios

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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## W pair production cross-section and W branching fractions in $e^+ e^-$ interactions at 183 GeV

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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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 $B({\tau \rightarrow \mu \nu \bar{\nu}}) =... Repository : HAL - Hyper Article on Line Language(s) : Undetermined ## Energy dependence of event shapes and of$\alpha_s$at LEP 2 Description : Infrared and collinear safe event shape distributions and their mean values are determined using the data taken at ve di erent centre of mass energies above$M_Z$with the DELPHI detector at LEP. From the event shapes, the strong coupling$\alpha_s$is extracted in$O(\alpha^2_s)$, NLLA and a combin... Repository : HAL - Hyper Article on Line Language(s) : Undetermined ## Multiplicity fluctuations in one- and two-dimensional angular intervals compared with analytic QCD calculations Description : Multiplicity fluctuations in rings around the jet axis and in off-axis cones have been measured by the DELPHI collaboration in$e^+e^-$annihilations into hadrons at LEP energies. The measurements are compared with analytical perturbative QCD calculations for the corresponding multiparton system, us... Repository : HAL - Hyper Article on Line Language(s) : Undetermined ## Search for charged Higgs bosons at LEP 2 Description : A search for pair produced charged Higgs bosons has been performed in the high energy data collected by DELPHI at LEP with$\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$final states and a combination of event shape variables... Repository : HAL - Hyper Article on Line Language(s) : Undetermined ## Measurement of the mass of the W boson using direct reconstruction at$\sqrt{s}$= 183 GeV 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... Repository : HAL - Hyper Article on Line Language(s) : 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$b\overline{b}$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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Found 106 documents, displaying page 6 of 11