Search results for "Z0"
showing 10 items of 712 documents
"Table 5" of "Measurements of the tau polarization in Z0 decays"
1995
The same as in previous table but the fit was made assuming lepton universality: Ptau = Pz. The first error is statistical, the second is due to the simulated data statistics and the third due to all other systematic uncertainties.
"Table 4" of "Measurements of the tau polarization in Z0 decays"
1995
TAU and Z polarization values was obtained as a result of fit of the POL(cos(theta)) distribution to the formula Ptau(COS(THETA)) = (Ptau*(1+cos**2(theta))+Pz*2*cos(theta))/ ((1+cos**2(theta))+Ptau*Pz*2*cos(theta)). Results are corrected for QED effects and for the center-of-mass energies different to M(Z) with the program ZFITTER.. The first error is statistical, the second is due to the simulated data statistics and the third due to all other systematic uncertainties.
"Table 1" of "Measurements of the tau polarization in Z0 decays"
1995
Results are for both TAU+ and TAU- decay.
"Table 2" of "Measurements of the tau polarization in Z0 decays"
1995
The systematic error contains a systematic error of 0.003 common to all channels.
"Table 7" of "Measurements of the tau polarization in Z0 decays"
1995
Combination of current result with the TAU polarization value obtained from the analysis on 1990 data ( ZP C55, 555), assuming fully correlated systematic errors and lepton universality.
"Table 6" of "Measurements of the tau polarization in Z0 decays"
1995
Combination of current result with the TAU polarization value obtained from the analysis on 1990 data ( ZP C55, 555), assuming fully correlated systematic errors.
PRODUCTION CHARACTERISTICS OF K-0 AND LIGHT MESON RESONANCES IN HADRONIC DECAYS OF THE Z(0)
1995
An analysis of inclusive production of K0and the meson resonances K*±(892), Ï0(770), f0(975) and f2(1270) in hadronic decays of the Z0is presented, based on about 973,000 multihadronic events collected by the DELPHI detector at LEP during 1991 and 1992. Overall multiplicities have been determined as 1.962±0.060 K0mesons, 0.712±0.067 K*±(892) and 1.21±0.15Ï0(770) per hadronic Z0decay. The average multiplicities of f0(975) for scaled momentum, xp, in the range 0.05â¤xpâ¤0.6 and of f2(1270) for 0.05â¤xpâ¤1.0 are 0.098±0.016 and 0.170±0.043 respectively. The f0(975) and Ï0(770)xp-spectra have similar shapes. The f2(1270)/Ï0(770) ratio increases with xp. The average multiplicities…
Measurement of inclusive pi(0) production in hadronic Z(0) decays
1996
An analysis is presented of inclusive \pi^0 production in Z^0 decays measured with the DELPHI detector. At low energies, \pi^0 decays are reconstructed by \linebreak using pairs of converted photons and combinations of converted photons and photons reconstructed in the barrel electromagnetic calorimeter (HPC). At high energies (up to x_p = 2 \cdot p_{\pi}/\sqrt{s} = 0.75) the excellent granularity of the HPC is exploited to search for two-photon substructures in single showers. The inclusive differential cross section is measured as a function of energy for {q\overline q} and {b \bar b} events. The number of \pi^0's per hadronic Z^0 event is N(\pi^0)/ Z_{had}^0 = 9.2 \pm 0.2 \mbox{(stat)} \…
A 1D coupled Schrödinger drift-diffusion model including collisions
2005
We consider a one-dimensional coupled stationary Schroedinger drift-diffusion model for quantum semiconductor device simulations. The device domain is decomposed into a part with large quantum effects (quantum zone) and a part where quantum effects are negligible (classical zone). We give boundary conditions at the classic-quantum interface which are current preserving. Collisions within the quantum zone are introduced via a Pauli master equation. To illustrate the validity we apply the model to three resonant tunneling diodes.
An algorithm for computing geometric relative velocities through Fermi and observational coordinates
2013
We present a numerical method for computing the \textit{Fermi} and \textit{observational coordinates} of a distant test particle with respect to an observer. We apply this method for computing some previously introduced concepts of relative velocity: \textit{kinematic}, \textit{Fermi}, \textit{spectroscopic} and \textit{astrometric} relative velocities. We also extend these concepts to non-convex normal neighborhoods and we make some convergence tests, studying some fundamental examples in Schwarzschild and Kerr spacetimes. Finally, we show an alternative method for computing the Fermi and astrometric relative velocities.