K. Hultqvist

Determination of heavy quark non-perturbative parameters from spectral moments in semileptonic B decays

Abstract.Moments of the hadronic invariant mass and of the lepton energy spectra in semileptonic B decays have been determined with the data recorded by the DELPHI detector at LEP. From measurements of the inclusive b-hadron semileptonic decays, and imposing constraints from other measurements on b- and c-quark masses, the first three moments of the lepton energy distribution and of the hadronic mass distribution, have been used to determine parameters which enter into the extraction of |Vcb| from the measurement of the inclusive b-hadron semileptonic decay width. The values obtained in the kinetic scheme are:

A Measurement of the tau hadronic branching ratios

\begin{array}{*{20}l} {{m_{b} {\left( {1\;{\text{GeV}}} \right)}} \hfill} & { = \hfill} & {{4.591 \pm 0.062 \pm 0.039 \pm 0.005\;{\text{GeV/c}}^{2} ,} \hfill} \\ {{m_{c} {\left( {1\;{\text{GeV}}} \right)}} \hfill} & { = \hfill} & {{1.170 \pm 0.093 \pm 0.055 \pm 0.005\;{\text{GeV/c}}^{{\text{2}}} {\text{,}}} \hfill} \\ {{\mu ^{2}_{\pi } {\left( {1\;{\text{GeV}}} \right)}} \hfill} & { = \hfill} & {{0.399 \pm 0.048 \pm 0.034 \pm 0.087\;{\text{GeV}}^{{\text{2}}} {\text{,}}} \hfill} \\ {{ \ifmmode\expandafter\tilde\else\expandafter\~\fi{\rho }^{3}_{D} } \hfill} & { = \hfill} & {{0.053 \pm 0.017 \pm 0.011 \pm 0.026\;{\text{GeV}}^{{\text{3}}} ,} \hfill} \\ \end{array}

Measurement of the transverse momentum distributions ofW andZ bosons at the CERN\(\bar pp\) collider

and include corrections at order 1/mb3. Using these results, and present measurements of the inclusive semileptonic decay partial width of b-hadrons at LEP, an accurate determination of |Vcb| is obtained:

Performance of the HPC calorimeter in DELPHI

{\left| {V_{{cb}} } \right|} = 0.0421 \times {\left( {1 \pm 0.014_{{{\text{meas}}{\text{.}}}} \pm 0.014_{{{\text{fit}}}} \pm 0.015_{{{\text{th}}{\text{.}}}} } \right)}

Search for Diffuse Fluxes of Extraterrestrial Muon- Neutrinos with the AMANDA Detectors

The exclusive and semi-exclusive branching ratios of the τ lepton hadronic decay modes (

Search for neutralino pair-production

h^- \nu_\tau

Limits on the masses of supersymmetric particles at

,

\sqrt{s}

h^- \pi0 \nu_\tau

up to 202 GeV

,