Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb-Au collisions at 158A GeV/c

被引：92

作者：

Adamova, D. ^{[2
]}

Agakichiev, G. ^{[3
]}

Antonczyk, D. ^{[3
]}

Appelshaeuser, H. ^{[1
]}

Belaga, V. ^{[4
]}

Bielcikova, J. ^{[5
]}

Braun-Munzinger, P. ^{[3
]}

Busch, O. ^{[3
]}

Cherlin, A. ^{[6
]}

Damjanovic, S. ^{[5
]}

Dietel, T. ^{[5
]}

Dietrich, L. ^{[5
]}

Drees, A. ^{[7
]}

Dubitzky, W. ^{[5
]}

Esumi, S. I. ^{[5
]}

Filimonov, K. ^{[4
,5
]}

Fomenko, K.

Fraenkel, Z. ^{[6
]}

Garabatos, C. ^{[3
]}

Glaessel, P. ^{[5
]}

Holeczek, J. ^{[3
]}

Kushpil, V. ^{[2
]}

Maas, A. ^{[3
]}

Marin, A. ^{[3
]}

Milosevic, J. ^{[5
]}

Milov, A. ^{[6
]}

Miskowiec, D. ^{[3
]}

Panebrattsev, Yu. ^{[4
]}

Petchenova, O. ^{[4
]}

Petracek, V. ^{[5
]}

Pfeiffer, A. ^{[8
]}

Rak, J. ^{[9
]}

Ravinovich, I. ^{[6
]}

Rehak, P. ^{[10
]}

Sako, H. ^{[3
]}

Schmitz, W. ^{[5
]}

Sedykh, S. ^{[3
]}

Shimansky, S. ^{[4
]}

Stachel, J. ^{[5
]}

Sumbera, M. ^{[2
]}

Tilsner, H. ^{[5
]}

Tserruya, I. ^{[6
]}

Wessels, J. P. ^{[11
]}

Wienold, T. ^{[5
]}

Wurm, J. P. ^{[9
]}

Xie, W. ^{[6
]}

Yurevich, S. ^{[5
]}

Yurevich, V. ^{[4
]}

机构：

[1] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

[2] Nucl Phys Inst ASCR, Rez 25068, Czech Republic

[3] Gesell Schwerionenforsch GSI, D-64291 Darmstadt, Germany

[4] Joint Inst Nucl Res, Dubna 141980, Russia

[5] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[6] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[7] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

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

[9] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[10] Brookhaven Natl Lab, Upton, NY 11973 USA

[11] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

来源：

PHYSICS LETTERS B | 2008年 / 666卷 / 05期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/j.physletb.2008.07.104

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a measurement of e(+) e(-) pair production in central Pb-Au collisions at 158A GeV/c. As reported earlier, a significant excess of the e(+) e(-) pair yield over the expectation from hadron decays is observed. The improved mass resolution of the present data set, recorded with the upgraded CERES experiment at the CERN-SPS, allows for a comparison of the data with different theoretical approaches. The data clearly favor a substantial in-medium broadening of the p spectral function over a density-dependent shift of the p pole mass. The in-medium broadening model implies that baryon induced interactions are the key mechanism to the observed modifications of the rho meson at SPS energy. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：425 / 429

页数：5

共 32 条

[1] Leptonic and charged kaon decay modes of the φ meson measured in heavy-ion collisions at the CERN super proton synchrotron [J].

Adamová, D ;

Agakichiev, G ;

Antonczyk, D ;

Appelshäuser, H ;

Belaga, V ;

Bielcíková, J ;

Braun-Munzinger, P ;

Busch, O ;

Cherlin, A ;

Damjanovic, S ;

Dietel, T ;

Dietrich, L ;

Drees, A ;

Esumi, SI ;

Filimonov, K ;

Fomenko, K ;

Fraenkel, Z ;

Garabatos, C ;

Glässel, P ;

Hering, G ;

Holeczek, J ;

Krobath, G ;

Kushpil, V ;

Ludolphs, W ;

Maas, A ;

Marín, A ;

Milosevic, J ;

Miskowiec, D ;

Ortega, R ;

Panebrattsev, Y ;

Petchenova, O ;

Petrácek, V ;

Radomski, S ;

Rak, J ;

Ravinovich, I ;

Rehak, P ;

Sako, H ;

Schmitz, W ;

Schukraft, J ;

Sedykh, S ;

Shimansky, S ;

Stachel, J ;

Sumbera, M ;

Tilsner, H ;

Tserruya, I ;

Tsiledakis, G ;

Wessels, JP ;

Wienold, T ;

Wurm, JP ;

Yurevich, S .

PHYSICAL REVIEW LETTERS, 2006, 96 (15)

[2] Enhanced production of low-mass electron-positron pairs in 40-AGeV Pb-Au collisions at the CERN SPS -: art. no. 042301 [J].

Adamová, D ;

Agakichiev, G ;

Appelshäuser, H ;

Belaga, V ;

Braun-Munzinger, P ;

Cherlin, A ;

Damjanovic, S ;

Dietel, T ;

Dietrich, L ;

Drees, A ;

Esumi, SI ;

Filimonov, K ;

Fomenko, K ;

Fraenkel, Z ;

Garabatos, C ;

Glässel, P ;

Hering, G ;

Holeczek, J ;

Kushpil, V ;

Lenkeit, B ;

Maas, A ;

Marín, A ;

Milosevic, J ;

Milov, A ;

Miskowiec, D ;

Panebrattsev, Y ;

Petchenova, O ;

Petrácek, V ;

Pfeiffer, A ;

Rak, J ;

Ravinovich, I ;

Rehak, P ;

Richter, M ;

Sako, H ;

Schmitz, W ;

Sedykh, S ;

Seipp, W ;

Sharma, A ;

Shimansky, S ;

Slívová, J ;

Specht, HJ ;

Stachel, J ;

Sumbera, M ;

Tilsner, H ;

Tserruya, I ;

Wessels, JP ;

Wienold, T ;

Windelband, B ;

Wurm, JP ;

Xie, W .

PHYSICAL REVIEW LETTERS, 2003, 91 (04)

[3]

ADAMOVA D, NUCL INSTRU IN PRESS

[4]

AFANASIEV S, PHYS REV LE IN PRESS

[5] Low-mass e+e- pair production in 158 A GeV Pb-Au collisions at the CERN SPS, its dependence on multiplicity and transverse momentum [J].

Agakichiev, G ;

Baur, R ;

Braun-Munzinger, P ;

Ceretto, F ;

Drees, A ;

Esumi, S ;

Faschingbauer, U ;

Fraenkel, Z ;

Fuchs, C ;

Gatti, E ;

Glassel, P ;

de los Heros, CP ;

Holl, P ;

Jung, C ;

Lenkeit, B ;

Messer, M ;

Panebrattsev, Y ;

Pfeiffer, A ;

Rak, J ;

Ravinovich, I ;

Razin, S ;

Rehak, P ;

Richter, M ;

Sampietro, M ;

Saveljic, N ;

Schukraft, J ;

Shimansky, S ;

Seipp, W ;

Socol, E ;

Specht, HJ ;

Stachel, J ;

Tel-Zur, G ;

Tserruya, I ;

Ullrich, T ;

Voigt, C ;

Weber, C ;

Wessels, JP ;

Wienold, T ;

Wurm, JP ;

Yurevich, V .

PHYSICS LETTERS B, 1998, 422 (1-4) :405-412

[6] EFFECTS OF PAIR CORRELATIONS IN STATISTICAL GAMMA-DECAY SPECTRA [J].

DOSSING, T ;

KHOO, TL ;

LAURITSEN, T ;

AHMAD, I ;

BLUMENTHAL, D ;

CARPENTER, MP ;

CROWELL, B ;

GASSMANN, D ;

HENRY, RG ;

JANSSENS, RVF ;

NISIUS, D .

PHYSICAL REVIEW LETTERS, 1995, 75 (07) :1276-1279

[7] e+e- -pair production in Pb-Au collisions at 158 GeV per nucleon [J].

Agakichieva, G ;

Appelshäuser, H ;

Bielcikova, J ;

Baur, R ;

Braun-Munzinger, P ;

Cherlin, A ;

Damjanovic, S ;

Drees, A ;

Esumi, S ;

Faschingbauer, U ;

Fraenkel, Z ;

Fuchs, C ;

Gatti, E ;

Glässel, P ;

Hering, G ;

Heros, CPD ;

Holl, P ;

Jung, C ;

Lenkeit, B ;

Marín, A ;

Messer, F ;

Messer, M ;

Miskowiec, D ;

Nix, O ;

Panebrattsev, Y ;

Pfeiffer, A ;

Rak, J ;

Ravinovich, I ;

Razin, S ;

Rehak, P ;

Richter, M ;

Sampietro, M ;

Sako, H ;

Saveljic, N ;

Schmitz, W ;

Schukraft, J ;

Seipp, W ;

Shimanskiy, S ;

Socol, E ;

Specht, HJ ;

Stachel, J ;

Tel-Zur, G ;

Tserruya, I ;

Ullrich, T ;

Voigt, C ;

Voloshin, S ;

Weber, C ;

Wessels, JP ;

Wienold, T ;

Wurm, JP .

EUROPEAN PHYSICAL JOURNAL C, 2005, 41 (04) :475-513

[8] First measurement of the ρ spectral function in high-energy nuclear collisions -: art. no. 162302 [J].

Arnaldi, R ;

Averbeck, R ;

Banicz, K ;

Castor, J ;

Chaurand, B ;

Cicalò, C ;

Colla, A ;

Cortese, P ;

Damjanovic, S ;

David, A ;

De Falco, A ;

Devaux, A ;

Drees, A ;

Ducroux, L ;

En'yo, H ;

Fargeix, J ;

Ferretti, A ;

Floris, M ;

Förster, A ;

Force, P ;

Guettet, N ;

Guichard, A ;

Gulkanian, H ;

Heuser, JM ;

Keil, M ;

Kluberg, L ;

Lourenco, C ;

Lozano, J ;

Manso, F ;

Masoni, A ;

Martins, P ;

Neves, A ;

Ohnishi, H ;

Oppedisano, C ;

Parracho, P ;

Pillot, P ;

Puddu, G ;

Radermacher, E ;

Ramalhete, P ;

Rosinsky, P ;

Scomparin, E ;

Seixas, J ;

Serci, S ;

Shahoyan, R ;

Sonderegger, P ;

Specht, HJ ;

Tieulent, R ;

Usai, G ;

Veenhof, R ;

Wöhri, HK .

PHYSICAL REVIEW LETTERS, 2006, 96 (16)

[9] Relativistic nuclear collisions and the QCD phase boundary [J].

Braun-Munzinger, P .

NUCLEAR PHYSICS A, 2005, 751 :127C-138C

[10] On the manifestation of chiral symmetry in nuclei and dense nuclear matter [J].

Brown, GE ;

Rho, M .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2002, 363 (02) :85-171

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