2,446 research outputs found
Analytic calculation of Bose-Einstein correlations at LEP1 and LEP2
Theoretical results in the tau-model are discussed in the context of
Bose-Einstein correlations in e+e- annihilations at LEP1 and LEP2 as well as
that of relativistic heavy ion collisions at SPS and RHIC.Comment: 4 pages, invited talk at the XXXIIth Int. Symp. Multiparticle
Dynamics, Alushta, Crimea, Ukrain
Wigner Functions in High Energy Physics
Recent developments are (meta)reviewed in the applications of Wigner
functions to describe the observed single particle spectra and two-particle
Bose-Einstein (or Hanbury Brown -- Twiss) correlations in high energy particle
and nuclear physics, with examples from hadron-proton and Pb + Pb collisions at
CERN SPS.Comment: 4 pages, invited talk at the Wigner Centennial Conference, Pecs,
Hungary, July 200
Observation of Odderon Effects at LHC energies -- A Real Extended Bialas-Bzdak Model Study
The unitarily extended Bialas-Bzdak model of elastic proton-proton scattering
is applied, without modifications, to describe the differential cross-section
of elastic proton-antiproton collisions in the TeV energy range, and to
extrapolate these differential cross-sections to LHC energies. In this
model-dependent study we find that the differential cross-sections of elastic
proton-proton collision data at 2.76 and 7 TeV energies differ significantly
from the differential cross-section of elastic proton-antiproton collisions
extrapolated to these energies. The elastic proton-proton differential
cross-sections, extrapolated to 1.96 TeV energy with the help of this extended
Bialas-Bzdak model do not differ significantly from that of elastic
proton-antiproton collisions, within the theoretical errors of the
extrapolation. Taken together these results provide a model-dependent, but
statistically significant evidence for a crossing-odd component of the elastic
scattering amplitude at the at least 7.08 sigma level. From the reconstructed
Odderon and Pomeron amplitudes, we determine the dependence of the
corresponding total and differential cross-sections.Comment: Final version, typos fixed, accepted for a publication in EPJ C,
including 3 tables, 32 figures, 61 pages. Model dependent Odderon
significance stands at 7.08 sigma. Appendix C and D added to discuss the
s-dependent Pomeron and Odderon amplitudes and cross-sections and to
cross-check possible non-linear evolution of the model parameters at ISR
energie
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