K(892)0 and (K)over-bar(892)0 production in central Pb plus Pb, Si plus Si, C plus C, and inelastic p plus p collisions at 158A GeV

被引：34

作者：

Anticic, T. ^{[1
]}

Baatar, B. ^{[9
]}

Barna, D. ^{[5
]}

Bartke, J. ^{[7
]}

Beck, H. ^{[10
]}

Betev, L. ^{[11
]}

Bialkowska, H. ^{[20
]}

Blume, C. ^{[10
]}

Bogusz, M. ^{[22
]}

Boimska, B. ^{[20
]}

Book, J. ^{[10
]}

Botje, M. ^{[2
]}

Buncic, P. ^{[11
]}

Cetner, T. ^{[22
]}

Christakoglou, P. ^{[2
]}

Chung, P. ^{[19
]}

Chvala, O. ^{[15
]}

Cramer, J. G. ^{[16
]}

Eckardt, V. ^{[14
]}

Fodor, Z. ^{[5
]}

Foka, P. ^{[8
]}

Friese, V. ^{[8
]}

Gazdzicki, M. ^{[10
,12
]}

Grebieszkow, K. ^{[22
]}

Hoehne, C. ^{[8
]}

Kadija, K. ^{[1
]}

Karev, A. ^{[11
]}

Kolesnikov, V. I. ^{[9
]}

Kowalski, M. ^{[7
]}

Kresan, D. ^{[8
]}

Laszlo, A. ^{[5
]}

Lacey, R. ^{[19
]}

van Leeuwen, M. ^{[2
]}

Mackowiak, M. ^{[22
]}

Makariev, M. ^{[18
]}

Malakhov, A. I. ^{[9
]}

Mateev, M. ^{[17
]}

Melkumov, G. L. ^{[9
]}

Mitrovski, M. ^{[10
]}

Mrowczynski, S. ^{[12
]}

Nicolic, V. ^{[1
]}

Palla, G. ^{[5
]}

Panagiotou, A. D. ^{[3
]}

Peryt, W. ^{[22
]}

Pluta, J. ^{[22
]}

Prindle, D. ^{[16
]}

Puehlhofer, F. ^{[13
]}

Renfordt, R. ^{[10
]}

Roland, C. ^{[6
]}

Roland, G. ^{[6
]}

机构：

[1] Rudjer Boskovic Inst, Zagreb, Croatia

[2] NIKHEF, Amsterdam, Netherlands

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

[4] Eotvos Lorand Univ, Budapest, Hungary

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

[6] MIT, Cambridge, MA 02139 USA

[7] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[8] GSI Helmholtzzentrum Schwerionenforsch, Darmstadt, Germany

[9] Joint Inst Nucl Res, Dubna, Russia

[10] Goethe Univ Frankfurt, Fachbereich Phys, Frankfurt, Germany

[11] CERN, Geneva, Switzerland

[12] Jan Kochanowski Univ, Inst Phys, Kielce, Poland

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

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

[15] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, Prague, Czech Republic

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

[17] Sofia Univ St Kliment Ohridski, Dept Atom Phys, Sofia, Bulgaria

[18] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[19] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

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

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

[22] Warsaw Univ Technol, Fac Phys, Warsaw, Poland

来源：

PHYSICAL REVIEW C | 2011年 / 84卷 / 06期

关键词：

FREEZE-OUT; RESONANCE;

D O I：

10.1103/PhysRevC.84.064909

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：

Production of the K*(892)(0) and (K) over bar*(892)(0) resonances was studied via their K+pi(-) and K-pi(+) decay modes in central Pb + Pb, Si + Si, C + C, and inelastic p + p collisions at 158A GeV(root s(NN) = 17.3 GeV) with the NA49 detector at the CERN SPS. Transverse momentum and rapidity distributions were measured and total yields were estimated. The yield of K* exceeds that of (K) over bar* by about a factor of two in nucleus-nucleus reactions. The total yield ratios < K*>/< K+> and <(K) over bar*>/< K > are strongly suppressed in central Pb + Pb compared to p + p, C + C, and Si + Si collisions, in agreement with the expected attenuation of these short-lived resonance states in the hadronic phase of the expanding fireball. The UrQMD model, although incorporating such a scenario, does not provide a quantitative description of the experimental results. The statistical hadron gas model assuming the same freeze-out parameters for stable hadrons and resonances overestimates the < K*>/< K > ratios in central Pb + Pb collisions by about a factor of 2.5.

引用

页数：14

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K*(892)0 and (K)over-bar*(892)0 production in central Pb plus Pb, Si plus Si, C plus C, and inelastic p plus p collisions at 158A GeV

K(892)0 and (K)over-bar(892)0 production in central Pb plus Pb, Si plus Si, C plus C, and inelastic p plus p collisions at 158A GeV