NUKLEONIKA 2006, 51(Suppl. 3):s59-s63
Hanna Paulina Gos
for the STAR Collaboration
SUBATECH, Laboratoire de Physique Subatomique et des Technologies Associees,
EMN-IN2P3/CNRS-Universite, Nantes, F-44307, France
and Warsaw University of Technology, Faculty of Physics,
75 Koszykowa Str., 00-662 Warsaw, Poland
Particle correlations at small relative velocities can be used to study the space-time evolution of
hot and expanding system created in heavy-ion collisions. Baryon and antibaryon source sizes extracted
from baryon-baryon correlations complement the information deduced from the correlation studies of
identical pions. Correlations of non-identical particles are sensitive also to the space-time asymmetry
of their emission. High statistics data set of STAR experiment allows us to present the results of
baryon-baryon correlation measurements at various centralities and energies, as well as to take
carefully into account the particle identification probability and the fraction of primary baryons
and antibaryons. Preliminary results show significant contribution of annihilation channel in
baryon-antibaryon correlations.