17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies

18 Jul 2013, 16:46
16m
E2 (KTH Campus)

E2

KTH Campus

Talk presentation Ultrarelativistic Heavy Ions Ultrarelativistic Heavy Ions

Speaker

Maciej Rybczynski (Jan Kochanowski University (PL))

Description

The exploration of the QCD phase diagram and particularly the search for a phase transition from hadronic to partonic degrees of freedom and possibly a critical endpoint, is one of the most challenging tasks in present heavy-ion physics. As observed by the NA49 experiment, several hadronic observables in central Pb+Pb collisions at the CERN SPS show qualitative changes in their energy dependence. These features are not observed in elementary interactions and indicate the onset of a phase transition in the SPS energy range [1,2]. Further information about the existence and nature of a phase transition in the SPS energy range can be gained from the studies of event-by-event fluctuations of final state hadron distributions and yields performed by the NA61/SHINE [3], a successor of the NA49 experiment. New results on p+p interactions at 20, 31, 40, 80 and 158 GeV/c will be shown. They will include: - inclusive spectra of pi+, pi-, K-, and protons as a function of transverse momentum/mass and rapidity, - event-by-event fluctuations of transverse momentum, azimuthal angle and chemical composition. The new NA61 data will be compared with the corresponding results of NA49 on central Pb+Pb collisions as well as with the predictions of Monte Carlo models. The NA61/SHINE future plans will be presented. [1] C. Alt et al., Phys. Rev. C 77 (2008) 024903 [2] M. Gazdzicki et al., J. Phys. G 30 (2004) S701 [3] N.Antoniou et al. [NA61/SHINE Collaboration], CERN SPSC-2007-019, (2007).

Primary author

Maciej Rybczynski (Jan Kochanowski University (PL))

Presentation Materials