pi Xi CORRELATIONS: MODEL COMPARISON AND Xi*(1530) PUZZLE

0338740 - ÚJF 2010 RIV PL eng J - Journal Article
Chaloupka, Petr - Šumbera, Michal - Malinina, L.V.
pi Xi CORRELATIONS: MODEL COMPARISON AND Xi*(1530) PUZZLE.
Acta physica Polonica. B. Roč. 40, č. 4 (2009), s. 1185-1192. ISSN 0587-4254. E-ISSN 1509-5770
Institutional research plan: CEZ:AV0Z10480505
Keywords : NONIDENTICAL PARTICLE CORRELATIONS * STAR * COLLISIONS
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 0.648, year: 2009

Predictions of hydrodynamics-parametrized statistical hadronization model HYDJET++ are compared to the STAR Collaboration preliminary pi Xi data. We demonstrate how decay of resonances and collective flow affect shift between the average freeze-out space-time points of Xi and pi. We study how different freeze-out scenarios: single freeze-out at T-th = T-ch = 0.165 GeV; thermal freeze-out at T-th = 0.1 GeV- combined scenario when Xi and Xi* (1530) are emitted at chemical freeze-out while all other particles are emitted at the thermal freeze-out influence this shift. We study influence of the relative contribution of Xi from Xi*(1530) resonance decay on the pi Xi emission asymmetries. We show that the best description of m(t)-spectra and space-time differences is achieved within the combined scenario.
Permanent Link: http://hdl.handle.net/11104/0182435