4 research outputs found
Non-extensivity Parameter of Thermodynamical Model of Hadronic Interactions at LHC energies
The LHC measurements above SPS and Tevatron energies give the opportunity to
test predictions of non-extensive thermodynamical picture of hadronic
interaction to examine measured transverse momenta distributions for new
interaction energy range. We determined Tsallis model non-extensivity parameter
for the hadronization process before short-lived particles decayed and distort
the initial p_t distribution. We have shown that it follows exactly smooth rise
determined at lower energies below present LHC record. The shape of the q
parameter energy dependence is consistent with expectations and the evidence of
the asymptotic limit may be seen.Comment: 2 pages, 2 figure
Predictions of hadron abundances in pp collisions at the LHC
Based on the statistical hadronization model, we obtain quantitative
predictions for the relative abundances of hadron species in pp collisions at
the LHC. By using the parameters of the model determined at sqrt s = 200 GeV,
and extrapolating the overall normalization from ppbar collisions at the SPS
and Tevatron, we find that the expected rapidity densities are almost
grand-canonical. Therefore, at LHC the ratios between different species become
essentially energy-independent, provided that the hadronization temperature T_H
and the strangeness suppression factor gamma_S retain the stable values
observed in the presently explored range of pp and ppbar collisions.Comment: 4 pages. Final version published in JP
Statistical hadronization phenomenology in fluctuations at ultra-relativistic energies
We discuss the information that can be obtained from an analysis of
fluctuations in heavy ion collisions within the context of the statistical
model of particle production. We then examine the recently published
experimental data on ratio fluctuations, and use it to obtain constraints on
the statistical properties (physically relevant ensemble, degree of chemical
equilibration, scaling across energies and system sizes) and freeze-out
dynamics (amount of reinteraction between chemical and thermal freeze-out) of
the system.Comment: Proceedings, SQM2009. Fig. 4, the main results figure, was wrong due
to editing mistake, now correcte
A comparative analysis of statistical hadron production
Becattini F, Castorina P, Milov A, Satz H. A comparative analysis of statistical hadron production. EUROPEAN PHYSICAL JOURNAL C. 2010;66(3-4):377-386.We perform a systematic comparison of the statistical model parametrization of hadron abundances observed in high-energy pp, AA and e (+) e (-) collisions. The basic aim of the study is to test if the quality of the description depends on the nature of the collision process. In particular, we want to see if nuclear collisions, with multiple initial interactions, lead to "more thermal" average multiplicities than elementary pp collisions or e (+) e (-) annihilation. Such a comparison is meaningful only if it is based on data for the same or similar hadronic species and if the analyzed data has quantitatively similar errors. When these requirements are maintained, the quality of the statistical model description is found to be the same for the different initial collision configurations