Study of dielectron production in C+C collisions at 1 A GeV

被引：84

作者：

Agakishiev, G. ^{[8
]}

Agodi, C. ^{[2
]}

Alvarez-Pol, H. ^{[15
]}

Balanda, A. ^{[4
,21
]}

Bassini, R. ^{[9
]}

Bellia, G. ^{[2
,17
]}

Belver, D. ^{[15
]}

Belyaev, A. ^{[6
]}

Blanco, A. ^{[3
]}

Boehmer, M. ^{[11
]}

Bortolotti, A. ^{[9
]}

Boyard, J. L. ^{[13
]}

Braun-Munzinger, P. ^{[1
]}

Cabanelas, P. ^{[15
]}

Castro, E. ^{[15
]}

Chernenko, S. ^{[6
]}

Christ, T. ^{[11
]}

Destefanis, M. ^{[8
]}

Diaz, J. ^{[16
]}

Dohrmann, F.

Dybczak, A. ^{[4
]}

Eberl, T. ^{[11
]}

Fabbietti, L. ^{[11
]}

Fateev, O. ^{[6
]}

Finocchiaro, P. ^{[2
]}

Fonte, P. ^{[3
,18
]}

Friese, J. ^{[11
]}

Froehlich, I. ^{[7
]}

Galatyuk, T. ^{[1
]}

Garzon, J. A. ^{[15
]}

Gernhaeuser, R. ^{[11
]}

Gil, A. ^{[16
]}

Gilardi, C. ^{[8
]}

Golubeva, M. ^{[10
]}

Gonzalez-Diaz, D. ^{[1
]}

Grosse, E. ^{[19
]}

Guber, F. ^{[10
]}

Heilmann, M. ^{[7
]}

Heinz, T. ^{[1
]}

Hennino, T. ^{[13
]}

Holzmann, R. ^{[1
]}

Lerusalimov, A. ^{[6
]}

Iori, I. ^{[9
,20
]}

Ivashkin, A. ^{[10
]}

Jurkovic, M. ^{[11
]}

Kaempfer, B.

Kajetanowicz, M.

Kanaki, K.

Karavicheva, T. ^{[10
]}

Kirschner, D.

机构：

[1] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[2] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95125 Catania, Italy

[3] LIP Lab Instrumentacao Expt Particulas, P-3004516 Coimbra, Portugal

[4] Jagiellonian Univ, Smoluchowski Inst Phys, PL-30059 Krakow, Poland

[5] Forschungszentrum Dresden Rossendorf, Inst Strahlenphys, D-01314 Dresden, Germany

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

[7] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany

[8] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[9] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[10] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[11] Tech Univ Munich, Phys Dept E12, D-85748 Mimchen, Germany

[12] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus

[13] Univ Paris 11, CNRS, IN2P3, Inst Phys Nucl UMR 8608, F-91406 Orsay, France

[14] Acad Sci Czech Republic, Inst Nucl Phys, Rez 25068, Czech Republic

[15] Univ Santiago Compostela, Dept Fis Particulas, Santiago de Compostela 15782, Spain

[16] Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia 46971, Spain

[17] Univ Catania, Dipartimento Fis & Astron, I-95125 Catania, Italy

[18] ISEC Coimbra, Coimbra, Portugal

[19] Tech Univ Dresden, D-01062 Dresden, Germany

[20] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[21] Panstwowa Wyzszo Szkola Zawodowa, PL-33300 Nowy Sacz, Poland

来源：

PHYSICS LETTERS B | 2008年 / 663卷 / 1-2期

关键词：

dilepton spectroscopy; heavy-ion reactions; excess yield; excitation function; DLS puzzle;

D O I：

10.1016/j.physletb.2008.03.062

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The emission of e(+)e(-) pairs from C + C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the pi(0)-Dalitz to the rho/omega invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta production. The data are in good agreement with results obtained in the former DLS experiment. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：43 / 48

页数：6

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