Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2012 Meeting

Section: Nuclear and Elementary Particles Physics

Title:

From Little Bangs to the Big Bang

Authors:

C. RISTEA, A. JIPA, I. LAZANU, Oana RISTEA, Valerica BABAN

Affiliation:

Faculty of Physics, University of Bucharest

E-mail

cat.ristea@gmail.com

Keywords:

relativistic nuclear collisions, quark gluon plasma, collective flow

Abstract:

In the high-energy nuclear collisions at relativistic energies, it has been evidenced the formation of the hot and dense matter called the strongly interacting quark gluon plasma (sQGP). Experiments at the RHIC and LHC can recreate quark-gluon plasma conditions similar to those when the Universe was less than a few microseconds old, and will ofer the best prospects for discovering how the Universe evolved in the early stages.In this work a "microscopic" Hubble constant (the expansion rate) for relativistic nuclear collisions, similar to cosmological Hubble constant, will be presented and discussed. These estimations are based on temporal connections between the evolution of nuclear matter produced in a relativistic heavy ion collision and the Universe evolution after the Big Bang. We will present experimental data obtained in heavy ion collisions at relativistic energies and will compare with the same parameters obtained from simulated data at future CBM-FAIR energies using the most important simulation codes from the high energy physics. The connections between the Big Bang and the little bangs -- created with particle colliders -- enable us both to learn particle physics from the Universe, and to use particle physics to understand the Universe. Note: The work of Catalin Ristea and Oana Ristea was supported by the strategic grant POSDRU/ 89 / 1.5 / S / 58852, Project „Postdoctoral programme for training scientific researchers“ cofinanced by the European Social Found within the Sectorial Operational Program Human Resources Development 2007-2013“ and by the PN-II-ID-PCE-IDEI 34/05.10.2011 grant.