Speaker
Ms
Valentina Mantovani Sarti
(TO)
Description
In recent years, the study of fluctuations of conserved charges has
received increasing attention: they turned out to be a promising tool to
study the deconfinement phase transition of QCD, the existence of a
critical point in the phase diagram and, more recently, the freeze-out
conditions in heavy-ion collisions (HICs).
The study of the lower and higher order moments of
particle
distributions measured in HICs would be very useful to provide insight in the
chemical freeze-out process.
On one side, fluctuations could represent a complementary tool, along with
the thermal fits to particle yields and ratios, to narrow the range of
temperature and baryochemical potential at freeze-out.
Moreover, since recent lattice QCD simulations and phenomenological models have found
first indications for a different transition-temperature for strange and
light quarks, the analysis of the higher order moments of the strange particle distributions measured in HICs would be very useful to clarify this issue.
Results on the moments of net-charge and net-proton number have been
presented by the STAR collaboration.
Combinations of such moments are related to volume-independent ratios of
cumulants, which can be calculated in the Hadron Resonance
Gas (HRG) model.
Primary authors
Prof.
Claudia Ratti
(University of Houston)
Dr
Marcus Bluhm
(Laboratoire SUBATECH)
Dr
Marlene Nahrgang
(Subatech, Nantes)
Mr
Paolo Alba
(FIAS)
Prof.
Rene Bellwied
(University of Houston)
Ms
Valentina Mantovani Sarti
(TO)
Wanda Maria Alberico
(TO)
