Interpreting BEC in e+ e- annihilation

The usual interpretation of Bose-Einstein correlations (BEC) of identical boson pairs relates the width of the peak in the correlation function at small relative four-momentum to the spatial extent of the source of the bosons. However, in the τ-model, which successfully describes BEC in hadronic Z decay, the width of the peak is related to the temporal extent of boson emission. Some new checks on the validity of both the τ-model and the usual descriptions are presented.

HANBURY-BROWN–TWISS INTERFEROMETRY WITH IDENTICAL BOSONS IN RELATIVISTIC HEAVY ION COLLISIONS: COMPARISONS WITH HADRONIC SCATTERING MODELS

Identical boson Hanbury-Brown–Twiss interferometry as applied to relativistic heavy-ion collisions is reviewed. Emphasis is placed on the use of hadronic scattering models to interpret the physical significance of experimental results. Interferometric studies with center-of-mass energies from <1 GeV/nucleon up to 5500 GeV/nucleon are considered.

Nuclear Systematics in the Interacting Boson (IBA) Model

Within the framework of the interacting boson approximation, simple analytical formulae are presented for analysing the mass dependence of particle transfer, inelastic scattering and electromagnetic decay from experimental data in nuclear physics. It is shown that the identical boson model provides a useful tool to correlate the results of these experiments and that the extension to equivalent proton and neutron bosons leads to some new and interesting results in the Pt-Hg mass region, namely the possibility of phase transitions and symmetry breaking.