Modelling of high energy collisions
In majority of cases high energy collisions result in multiparticle
production final states. So far they can be described only in some
model way. At the moment our most general picture of them is that in
a given collision a part of initial kinetic energy of projectiles (atomic
nuclei, hadrons, leptons or photons) is dissipated and finds itself
among produced secondaries. In fact they (their multiplicities, types
and momenta) are our sole source of information on the collision
process itself and the laws according which it proceeds. In particular,
we would like to learn whether such process goes through some intermediate
state of matter known as quark-gluon plasma (QGP) or takes some other
route. If this is indeed QGP we would like to learn what are its
properties (equation of state) and how it hadronizes into finally
observed secondaries (also built with quarks and gluons but now in
confined form). All these is investigated using numerical modelling based
on different statistical models.
The subjects of our interest at present are:
- modelling of all kind of fluctuations in such processes
(starting from fluctuations of the initial energy available
for production up to fluctuations of correlations between
different observables);
- description of different kind of fluctuations using the
so called non-extensive statistical approach which result
in power-like rather than exponential distributions;
- attempting to model numerically quantum correlations
resulting from definite quantum statistics of observed particles
(which are either bosons when carrying integer spin or
fermions when possessing half-integer spin and are,
respectively, either correlated or anticorrelated).
More information:
Professor Grzegorz Wilk
The Andrzej Soltan Institute for Nuclear Studies
Theoretical Physics Department
69 Hoża st.
Warszawa, Poland
phone ++(4822) 5532226