Particle production in central Pb+Pb collisions at 158A GeV/c

Particle production in central Pb+Pb collisions at 158A GeV/c
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DOI：
10.1103/physrevc.66.044907
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发表时间：
2002-10
期刊：
Physical Review C
影响因子：
3.1
通讯作者：
I. Bearden;H. Boggild;J. Boissevain;P. Christiansen;L. Conin;J. Dodd;B. Erazmus;S. Esumi;C. Fabjan;D. Ferenc;D. Fields;A. Franz;J. Gaardhøje;M. Hamelin;A. G. Hansen;O. Hansen;D. Hardtke;H. Hecke;E. Holzer;T. Humanic;P. Hummel;B. Jacak;K. Kaimi;M. Kaneta;T. Kohama;M. Kopytine;M. Leltchouk;A. Ljubičić;B. Lörstad;N. Maeda;R. Malina;L. Martin;A. Medvedev;M. Murray;H. Ohnishi;G. Paic;S. Pandey;F. Piuz;J. Pluta;Polychronakos;M. Potekhin;G. Poulard;D. Reichhold;A. Sakaguchi;J. Schmidt-Sørensen;J. Simon-Gillo;W. Sondheim;M. Spegel;T. Sugitate;J. Sullivan
I. Bearden;H. Boggild;J. Boissevain;P. Christiansen;L. Conin;J. Dodd;B. Erazmus;S. Esumi;C. Fabjan;D. Ferenc;D. Fields;A. Franz;J. Gaardhøje;M. Hamelin;A. G. Hansen;O. Hansen;D. Hardtke;H. Hecke;E. Holzer;T. Humanic;P. Hummel;B. Jacak;K. Kaimi;M. Kaneta;T. Kohama;M. Kopytine;M. Leltchouk;A. Ljubičić;B. Lörstad;N. Maeda;R. Malina;L. Martin;A. Medvedev;M. Murray;H. Ohnishi;G. Paic;S. Pandey;F. Piuz;J. Pluta;Polychronakos;M. Potekhin;G. Poulard;D. Reichhold;A. Sakaguchi;J. Schmidt-Sørensen;J. Simon-Gillo;W. Sondheim;M. Spegel;T. Sugitate;J. Sullivan
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
I. Bearden;H. Boggild;J. Boissevain;P. Christiansen;L. Conin;J. Dodd;B. Erazmus;S. Esumi;C. Fabjan;D. Ferenc;D. Fields;A. Franz;J. Gaardhøje;M. Hamelin;A. G. Hansen;O. Hansen;D. Hardtke;H. Hecke;E. Holzer;T. Humanic;P. Hummel;B. Jacak;K. Kaimi;M. Kaneta;T. Kohama;M. Kopytine;M. Leltchouk;A. Ljubičić;B. Lörstad;N. Maeda;R. Malina;L. Martin;A. Medvedev;M. Murray;H. Ohnishi;G. Paic;S. Pandey;F. Piuz;J. Pluta;Polychronakos;M. Potekhin;G. Poulard;D. Reichhold;A. Sakaguchi;J. Schmidt-Sørensen;J. Simon-Gillo;W. Sondheim;M. Spegel;T. Sugitate;J. Sullivan

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NA44实验测量了158A GeV/c Pb+Pb碰撞中带电介子、介子和质子的单粒子包含谱，并将其作为中速附近横向质量的函数。根据观测到的m(T)分布与粒子质量的关系，我们可以推断出热冻结时的温度约为120 MeV。从观测到的快密度比中，我们发现了光和奇异夸克的化学势值，以及大约140兆电子伏的化学冻结温度。
The NA44 experiment has measured single-particle inclusive spectra for charged pions, kaons, and protons as a function of transverse mass near midrapidity in 158A GeV/c Pb+Pb collisions. From the particle mass dependence of the observed m(T) distributions, we are able to deduce a value of about 120 MeV for the temperature at thermal freeze-out. From the observed ratios of the rapidity densities, we find values of the chemical potentials for light and strange quarks and a chemical freeze-out temperature of approximately 140 MeV.