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The Experts below are selected from a list of 69 Experts worldwide ranked by ideXlab platform

Vincent Lemaitre - One of the best experts on this subject based on the ideXlab platform.

  • Two-dimensional analysis of Bose-Einstein correlations in hadronic Z decays at LEP
    The European Physical Journal C, 2004
    Co-Authors: Christophe Delaere, Vincent Lemaitre
    Abstract:

    Bose-Einstein correlations are studied in pairs of charged pions from hadronic Z decays, collected by the ALEPH detector. The correlation function, measured using either the unlike-sign or the mixed reference sample, is studied in terms of the Lorentz-invariant four-momentum difference and its transverse, Q(T), and Longitudinal, Q(L), components with respect to the Longitudinal Centre-of-mass system. Values for the correlation radii, R-T and R-L, are obtained from the fit of the Goldhaber parametrisation. The results indicate that the correlation radii values depend on the chosen kind of reference sample and on the two-jet purity.

Christophe Delaere - One of the best experts on this subject based on the ideXlab platform.

  • Two-dimensional analysis of Bose-Einstein correlations in hadronic Z decays at LEP
    The European Physical Journal C, 2004
    Co-Authors: Christophe Delaere, Vincent Lemaitre
    Abstract:

    Bose-Einstein correlations are studied in pairs of charged pions from hadronic Z decays, collected by the ALEPH detector. The correlation function, measured using either the unlike-sign or the mixed reference sample, is studied in terms of the Lorentz-invariant four-momentum difference and its transverse, Q(T), and Longitudinal, Q(L), components with respect to the Longitudinal Centre-of-mass system. Values for the correlation radii, R-T and R-L, are obtained from the fit of the Goldhaber parametrisation. The results indicate that the correlation radii values depend on the chosen kind of reference sample and on the two-jet purity.

Nicholas R. T. Biggs - One of the best experts on this subject based on the ideXlab platform.

  • Acoustic trapped modes in a three-dimensional waveguide of slowly varying cross section
    Proceedings of the Royal Society A: Mathematical Physical and Engineering Sciences, 2013
    Co-Authors: Simon N. Gaulter, Nicholas R. T. Biggs
    Abstract:

    In this paper, we develop an asymptotic scheme to approximate the trapped mode solutions to the time harmonic wave equation in a three-dimensional waveguide with a smooth but otherwise arbitrarily shaped cross section and a single, slowly varying ‘bulge’, symmetric in the Longitudinal direction. Extending previous research carried out in the two-dimensional case, we first use a WKBJ-type ansatz to identify the possible quasi-mode solutions that propagate only in the thicker region, and hence find a finite cut-on region of oscillatory behaviour and asymptotic decay elsewhere. The WKBJ expansions are used to identify a turning point between the cut-on and cut-off regions. We note that the expansions are non-uniform in an interior layer Centred on this point, and we use the method of matched asymptotic expansions to connect the cut-on and cut-off regions within this layer. The behaviour of the expansions within the interior layer then motivates the construction of a uniformly valid asymptotic expansion. Finally, we use this expansion and the symmetry of the waveguide around the Longitudinal Centre, x =0, to extract trapped mode wavenumbers, which are compared with those found using a numerical scheme and seen to be extremely accurate, even to relatively large values of the small parameter.

F. Martin - One of the best experts on this subject based on the ideXlab platform.

  • Two-dimensional analysis of Bose-Einstein correlations in hadronic Z decays at LEP
    European Physical Journal C: Particles and Fields, 2004
    Co-Authors: A. Heister, S. Schael, R. Barate, R. Bruneliere, I. De Bonis, D. Decamp, C. Goy, S. Jezequel, J.p. Lees, F. Martin
    Abstract:

    Bose-Einstein correlations are studied in pairs of charged pions from hadronic Z decays, collected by the ALEPH detector.The correlation function, measured using either the unlike-sign or the mixed reference sample, is studied in terms of the Lorentz-invariant four-momentum difference and its transverse, $Q_{\textrm{T}}$, and Longitudinal, $Q_{\textrm{L}}$, components with respect to the Longitudinal Centre-of-mass system. Values for the correlation radii, $R_{\textrm{T}}$ and $R_{\textrm{L}}$, are obtained from the fit of the Goldhaber parametrisation.The results indicate that the correlation radii values depend on the chosen kind of reference sample and on the two-jet purity.

Nana Okra Abankwa - One of the best experts on this subject based on the ideXlab platform.

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