Production of φ-mesons in p + p, p + Pb and central Pb + Pb collisions at Ebeam=158 A GeV

被引：188

作者：

Afanasiev, SV

Anticic, T

Bächler, J

Barna, D

Barnby, LS

Bartke, J

Barton, RA

Betev, L

Bialkowska, H

Billmeier, A

Blume, C

Blyth, CO

Boimska, B

Bracinik, J

Brady, FP

Brun, R

Buncic, P

Carr, L

Cebra, D

Cooper, GE

Cramer, JG

Csató, P

Eckardt, V

Eckhardt, F

Ferenc, D

Fischer, HG

Fodor, Z

Foka, P

Freund, P

Friese, V

Ftacnik, J

Gál, J

Ganz, R

Gazdzicki, M

Gladysz, E

Grebieszkow, J

Harris, JW

Hegyi, S

Hlinka, V

Höhne, C

Igo, G

Ivanov, M

Jacobs, P

Janik, R

Jones, PG

Kadija, K

Kolesnikov, VI

Kowalski, M

Lasiuk, B

Lévai, P

机构：

[1] Univ Marburg, Fachbereich Phys, D-3550 Marburg, Germany

[2] Univ Athens, Dept Phys, Athens, Greece

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[4] Univ Birmingham, Birmingham, W Midlands, England

[5] Slovak Acad Sci, Inst Phys, Bratislava, Slovakia

[6] Res Inst Particle & Nucl Phys, KFKI, Budapest, Hungary

[7] CERN, CH-1211 Geneva 23, Switzerland

[8] Inst Nucl Phys, Krakow, Poland

[9] GSI Darmstadt, Gesell Schwerionenforsch GmbH, D-6100 Darmstadt, Germany

[10] Univ Calif Davis, Davis, CA 95616 USA

[11] Joint Inst Nucl Res, Dubna, Russia

[12] Goethe Univ Frankfurt, Fachbereich Phys, D-6000 Frankfurt, Germany

[13] Univ Houston, Houston, TX 77004 USA

[14] Kent State Univ, Kent, OH 44242 USA

[15] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[16] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[17] Inst Nucl Studies, PL-00681 Warsaw, Poland

[18] Univ Warsaw, Inst Expt Phys, Warsaw, Poland

[19] Univ Washington, Nucl Phys Lab, Seattle, WA 98195 USA

[20] Yale Univ, New Haven, CT 06520 USA

[21] Rudjer Boskovic Inst, Zagreb, Croatia

来源：

PHYSICS LETTERS B | 2000年 / 491卷 / 1-2期

基金：

匈牙利科学研究基金会; 美国国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0370-2693(00)01023-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Yields and phase space distributions of phi -mesons emitted from p + p (minimum bias trigger), p + Pb (at various centralities) and central Pb + Pb collisions are reported (E-beam = 158 A GeV). The decay phi --> K+K- was used for identification. The phi/pi ratio is found to increase by a factor of 3.0 +/- 0.7 from inelastic p + p to central Pb + Pb. Significant enhancement in this ratio is also observed in subclasses of p + p events (characterized by high charged-particle multiplicity) as well as in the forward hemisphere of central p + Pb collisions. In Pb + Pb no shift or significant broadening of the phi -peak is seen. (C) 2000 Published by Elsevier Science B.V.

引用

页码：59 / 66

页数：8

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