Measurement of the in-medium φ-meson width in proton-nucleus collisions

被引：61

作者：

Polyanskiy, A. ^{[2
,3
,4
]}

Hartmann, M. ^{[2
,3
]}

Kiselev, Yu. T. ^{[4
]}

Paryev, E. Ya. ^{[5
]}

Buescher, M. ^{[2
,3
]}

Chiladze, D. ^{[2
,3
,6
]}

Dymov, S. ^{[7
,8
]}

Dzyuba, A. ^{[9
]}

Gebel, R. ^{[2
,3
]}

Hejny, V. ^{[2
,3
]}

Kaempfer, B. ^{[10
]}

Keshelashvili, I. ^{[12
]}

Koptev, V. ^{[9
]}

Lorentz, B. ^{[2
,3
]}

Maeda, Y. ^{[13
]}

Merzliakov, S. ^{[2
,3
,8
]}

Mikirtytchiants, S. ^{[9
]}

Nekipelov, M. ^{[2
,3
]}

Ohm, H. ^{[2
,3
]}

Schade, H. ^{[10
]}

Serdyuk, V. ^{[2
,3
,8
]}

Sibirtsev, A. ^{[2
,3
,14
,15
,16
]}

Sinitsyna, V. Y. ^{[17
]}

Stein, H. J. ^{[2
,3
]}

Stroeher, H. ^{[2
,3
]}

Trusov, S. ^{[10
,11
]}

Valdau, Yu. ^{[2
,3
,9
]}

Wilkin, C. ^{[1
]}

Wuestner, P. ^{[18
]}

机构：

[1] UCL, Dept Phys & Astron, London WC1E 6BT, England

[2] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[3] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[4] Inst Theoret & Expt Phys, RU-117218 Moscow, Russia

[5] Russian Acad Sci, Inst Nucl Res, RU-117312 Moscow, Russia

[6] Tbilisi State Univ, Inst High Energy Phys, GE-0186 Tbilisi, Georgia

[7] Univ Erlangen Nurnberg, Inst Phys 2, D-91058 Erlangen, Germany

[8] Joint Nucl Res Inst, Lab Nucl Problems, RU-141980 Dubna, Russia

[9] Petersburg Nucl Phys Inst, Dept High Energy Phys, RU-188350 Gatchina, Russia

[10] Forschungszentrum Dresden Rossendorf, D-01314 Dresden, Germany

[11] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, RU-119991 Moscow, Russia

[12] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[13] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan

[14] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[15] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

[16] Thomas Jefferson Natl Accelerator Facility, Excited Baryon Anal Ctr EBAC, Newport News, VA 23606 USA

[17] PN Lebedev Phys Inst, RU-119991 Moscow, Russia

[18] Forschungszentrum Julich, Zent Inst Elekt, D-52425 Julich, Germany

来源：

PHYSICS LETTERS B | 2011年 / 695卷 / 1-4期

关键词：

phi meson production; Nuclear medium effects; INCLUSIVE PION-PRODUCTION; NEAR-THRESHOLD PRODUCTION; QCD SUM-RULES; VECTOR-MESONS; PHOTOPRODUCTION; DEPENDENCE; ANKE;

D O I：

10.1016/j.physletb.2010.10.050

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The production of phi mesons in the collisions of 2.83 GeV protons with C, Cu, Ag, and Au at forward angles has been measured via the phi -> K+K- decay using the COSY-ANKE magnetic spectrometer. The phi meson production cross section follows a target mass dependence of A(0.56 +/- 0.33) in the momentum region of 0.6-1.6 GeV/c. The comparison of the data with model calculations suggests that the in-medium phi width is about an order of magnitude larger than its free value. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：74 / 77

页数：4

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