Chemical property in heavy ion collisions

研究成果: Article査読

2 被引用数 (Scopus)

抄録

K-/K+ and p̄/p ratios measured in 158 A·GeV Pb + Pb collisions are shown as a function of centrality and transverse momentum (Pt). Little significant centrality dependence in neither K-/K+ nor p̄/p ratios are observed and they are almost constant as a function of Pt. The chemical freeze-out temperature Tch and the chemical potentials for both light and strange quarks (μqs) are extracted by comparing the present data with simple model predictions. The μqs and Tch from the NA44 are compared with those obtained from similar analysis of SPS S + A and AGS Si + A data. The chemical freeze-out temperature Tch in GERN energy is higher than thermal freeze-out temperature Tfo which is extracted from transverse momentum distribution of charged hadrons. In AGS energy Tch is close to Tfo.

本文言語English
ページ(範囲)167-171
ページ数5
ジャーナルProgress of Theoretical Physics Supplement
129
DOI
出版ステータスPublished - 1997
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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