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Possible interrelations among chemical freeze-out conditions

A. Tawfik
(
- Egyptian Ctr. Theor. Phys., Cairo and
- WLCAPP, Cairo
)
,
M.Y. El-Bakry
(
- Ain Shams U., Cairo
)
,
D.M. Habashy
(
- Ain Shams U., Cairo
)
,
M.T. Mohamed
(
- Ain Shams U., Cairo
)
,
E. Abbas
(
- WLCAPP, Cairo and
- Ain Shams U., Cairo
)

Mar 2, 2016

21 pages

Published in:

Int.J.Mod.Phys.E 25 (2016) 03, 1650018

Published: Mar 2, 2016

e-Print:

1603.07085 [hep-ph]

DOI:

10.1142/S021830131650018X

Report number:

ECTP-2015-04,
WLCAPP-2015-04

View in:

ADS Abstract Service

reference search15 citations

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Abstract: (World Scientific)

At thermal equilibrium, different chemical freeze-out conditions have been proposed so far. They have an ultimate aim of proposing a universal description for the chemical freeze-out parameters (Tch and μb), which are to be extracted from the statistical fitting of different particle ratios measured at various collision energies with calculations from thermal models. A systematic comparison between these conditions is presented. The physical meaning of each of them and their sensitivity to the hadron mass cuts are discussed. Based on availability, some of them are compared with recent lattice calculations. We found that most of these conditions are thermodynamically equivalent, especially at small baryon chemical potential. We propose that further crucial consistency tests should be performed at low energies. The fireball thermodynamics is another way of guessing conditions describing the chemical freeze-out parameters extracted from high-energy experiments. We endorse the possibility that the various chemical freeze-out conditions should be interpreted as different aspects of one universal condition.

Note:

14 pages, 11 figures, accepted for publication in International Journal of Modern Physics E

24.10.Pa
12.38.Mh
05.70.Ce
Heavy-ion collisions
hadron resonance gas
chemical freeze-out conditions
QCD phase diagram
freeze-out: chemical
potential: chemical
heavy ion: scattering

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