Energy dependence of Λ and (Λ)over-bar production at CERN-SPS energies

被引：28
作者：
Mischke, A [1 ]
机构：
[1] GSI Darmstadt, D-6100 Darmstadt, Germany
[2] Rudjer Boskovic Inst, Zagreb, Croatia
[3] Univ Warsaw, Inst Expt Phys, Warsaw, Poland
[4] Inst Nucl Studies, PL-00681 Warsaw, Poland
[5] Univ Washington, Nucl Phys Lab, Seattle, WA 98195 USA
[6] Charles Univ Prague, Inst Nucl & Particle Phys, Prague, Czech Republic
[7] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[8] Univ Marburg, Fachbereich Phys, D-3550 Marburg, Germany
[9] Univ Calif Los Angeles, Los Angeles, CA USA
[10] Kent State Univ, Kent, OH 44242 USA
[11] Univ Houston, Houston, TX USA
[12] CERN, Geneva, Switzerland
[13] Goethe Univ Frankfurt, Fachbereich Phys, D-6000 Frankfurt, Germany
[14] Joint Inst Nucl Res, Dubna, Russia
[15] Inst Nucl Phys, Krakow, Poland
[16] MIT, Cambridge, MA 02139 USA
[17] KFKI, Res Inst Particle & Nucl Phys, Budapest, Hungary
[18] Comenius Univ, Bratislava, Slovakia
[19] Univ Birmingham, Birmingham, W Midlands, England
[20] Univ Athens, Dept Phys, Athens, Greece
[21] NIKHEF H, NL-1009 DB Amsterdam, Netherlands
来源：
NUCLEAR PHYSICS A | 2003年 / 715卷
关键词：
D O I：
10.1016/S0375-9474(02)01433-1
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：
Rapidity distributions for Lambda and (Lambda) over barA hyperons in central Pb-Pb collisions at 40, 80 and 158 A(.)GeV and for K-s(0) mesons at 158 A(.)GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the Lambda/pi and (Lambda) over bar/pi is observed. The (Lambda) over bar/Lambda ratio shows a steep increase with collision energy. Evidence for a (Lambda) over bar/(p) over bar ratio greater than 1 is found at 40 A(.)GeV.
引用
收藏
页码：453C / 457C
页数：5
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