Transverse-momentum spectra of strange particles produced in Pb plus Pb collisions at √sNN=2.76 TeV in the chemical nonequilibrium model

被引：37

作者：

Begun, Viktor ^{[1
,2
]}

Florkowski, Wojciech ^{[1
,3
]}

Rybczynski, Maciej ^{[1
]}

机构：

[1] Jan Kochanowski Univ, Inst Phys, PL-25406 Kielce, Poland

[2] Bogolyubov Inst Theoret Phys, UA-03680 Kiev, Ukraine

[3] Polish Acad Sci, H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

来源：

PHYSICAL REVIEW C | 2014年 / 90卷 / 05期

关键词：

BOSE-EINSTEIN CONDENSATION; THERMAL HADRON-PRODUCTION; NUCLEUS-NUCLEUS COLLISIONS; PION-CONDENSATION; EQUILIBRATION; HADRONIZATION; THERMINATOR; GAS;

D O I：

10.1103/PhysRevC.90.054912

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We analyze the transverse-momentum spectra of strange hadrons produced in Pb + Pb collisions at the collision energy root s(NN) = 2.76 TeV for different centrality bins. Our approach combines the concept of chemical nonequilibrium with the single-freeze-out scenario. The two ideas are realized in the framework of the Cracow model, whose thermodynamic parameters have been established in earlier studies of the ratios of hadron multiplicities. The geometric parameters of the model are obtained from the fit to the spectra of pions and kaons, only. Using these parameters, we obtain an excellent description of the spectra of protons and the K-S(0), K*(892)(0), and phi(1020) mesons. A satisfactory description is obtained for the Lambda, Xi, and Omega hyperons.

引用

页数：9

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