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The ability
of the ALICE detector for determination of the space-time characteristics
of particle production in heavy-ion collisions at LHC from measurements
of the correlation functions of identical and nonidentical particles at
small relative velocities is discussed. The possibility to use the correlations
of nonidentical particles for a direct determination of the delays in emission
of various particle species at time scales as small as 10E-23; s is demonstrated.
The influence of the multi-boson effects on pion multiplicities, single-pion
spectra and two-pion correlation functions is discussed.
Particle interferometry is one of the tools proposed to extract quark-gluon plasma signatures in ultra-relativistic heavy-ion collisions at RHIC and LHC. From an experimental point of view, STAR and ALICE experiments installed at these facilities will provide exceptional conditions to study particle correlation studies. Some of the new possibilities open by these experiments are investigated.
The ability of the STAR detector for determination of the space-time
characteristics of particle production in heavy-ion collisions at RHIC
from measurements of the correlation functions of identical and non-identical
particles at small relative velocities is discussed. The possibility to
use the correlations of non-identical particles for a direct determination
of the delays in emission at time scales as small as 10E-23 s is demonstrated.
The influence of the multi-boson effects on pion multiplicities, single-pion
spectra and two-pion correlation functions is discussed.
The problem of the Coulomb corrections to the two-boson correlation functions for the systems formed in ultra-relativistic heavy ion collisions is considered for large effective volumes predicted in the realistic evolution scenarios taking into account the collective flows. A simple modification of the standard zero distance correction (so called Gamow or Coulomb factor) has been proposed for such a kind of systems. For (pi+,pi+) and (K+,K+) correlation functions this approximate analytical approach is compared with the exact numerical results and a good agreement is found for typical conditions at SPS, RHIC and even LHC energies.
The ALICE detector will offer very good conditions
to study the space-time characteristics of particle production in heavy-ion
collisions at LHC from measurements of the correlation function of identical
and non-identical particles atsmall relative velocities. The correlations
- induced by Coulomb and nuclear final-state interactions of non-identical
particles appear to be directly sensitive to the space-time asymmetries
of particle production allowing, in particular, a measurement of the mean
relative delays in particle emission at time scales as small as few fm/c.
The problem of Coulomb interaction of the correlated particles is particularly
important in the case of the large effective volumes formed in ultra-relativistic
heavy-ion reactions.