Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

Guest
2024-11-23 18:36

HOME CONFERENCES SEARCH LOGIN NEW USER IMAGES

Conference: Bucharest University Faculty of Physics 2002 Meeting

Section: Nuclear and Elementary Particles Physics

Title:

Resonance matter formation in relativistic nuclear collisions - Dynamical consequences.

Authors:

Al.Jipa, C.Besliu, D.Felea, I.S.Zgura, C.Grigorie, M.Potlog, C.Ristea, Oana Ristea, E.Stan

Affiliation:

Atomic and Nuclear Physics Department, Faculty of Physics,

University of Bucharest, ROMANIA

E-mail

Keywords:

Abstract:

The investigation of the nuclear matter in extreme conditions is one of the most important direction in today researches from the Relativistic Nuclear Physics field. A few of the reason are related to the possibility of investigating the state equation of the uclear matter and the opportunity of searching phase transitions (like the resonance matter or phase transition from nucleons to quarks and gluons). In this paper we review the properties of the resonant nuclear matter, the means of observing it as well as the motivations for such an enterprise. We emphasize the importance of resonance matter`s formation. Resonance matter acts in two direction, namely: first, as a source for generating new particles and, second, it inhibits the transition to a total deconfined quark state, the so-called quark-gluon plasma. One way of studying resonance matter in nucleus-nucleus collision at the incident energies above 1 GeV is to look for specific nucleons resonance signals in the effective mass spectrum. For the realisation of the effective mass distributions we followed a few steps, depending on the considered experiment. For example, for SKM 200 Experiment from JINR Dubna the steps are following. First, we obtained the transverse momentum distributions for the positive particles as well as for the negative ones. Then, we approximate the transverse momentum distribution for positive particles considering its resemblance with the distribution for the negative particles. Combining the spectra for different particles we deduce the spectrum of the effective mass for the relevant disintegration channels. The most interesting results are included in this paper. Finally, we present the predictions of two simulations codes: UrQMD(Ultrarelativistic Quantum Molecular Dynamics)and HIJING(Heavy Ion Jet Interactoin Generator) on the formation of the resonant matter in Au - Au collisions at incident energies available at RHIC(Relativistic Heavy Ion Collider) from Brookhaven National Laboratory(130 GeV/n, respectively 200 GeV/n, energies). The prediction are compared with some preliminary experimental results obtained by the BRAHMS Collaboration from RHIC-BNL.