Dilepton production in pp and CC collisions with HADES

被引：6
|
作者：
Froehlich, I. [1 ]
Agakishiev, G.
Agodi, C.
Balanda, A.
Bellia, G.
Belver, D.
Belyaev, A.
Blanco, A.
Boehmer, M.
Boyard, J. L.
Braun-Munzinger, P.
Cabanelas, P.
Castro, E.
Chernenko, S.
Christ, T.
Destefanis, M.
Diaz, J.
Dohrmann, F.
Eberl, T.
Fabbietti, L.
Fateev, O.
Finocchiaro, P.
Fonte, P. J. R.
Friese, J.
Galatyuk, T.
Garzon, J. A.
Gernhaeuser, R.
Gilardi, C.
Golubeva, M.
Gonzalez-Diaz, D.
Grosse, E.
Guber, F.
Hadjivasiliou, Ch.
Heilmann, M.
Hennino, T.
Holzmann, R.
Ierusalimov, A.
Iori, I.
Ivashkin, A.
Jurkovic, M.
Kaempfer, B.
Kanaki, K.
Karavicheva, T.
Kirschner, D.
Koenig, I.
Koenig, W.
Kolb, B. W.
Kotte, R.
Kozuch, A.
Krizek, F.
机构：
[1] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany
[2] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95125 Catania, Italy
[3] Univ Catania, Dipartimento Fis & Astron, I-95125 Catania, Italy
[4] Univ Coimbra, Dept Fis, LIP, P-3004516 Coimbra, Portugal
[5] ISEC, Coimbra, Portugal
[6] Jagiellonian Univ, Smoluchowski Inst Phys, PL-30059 Krakow, Poland
[7] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany
[8] Rossendorf Inc, Forschungszentrum Rossendorf EV, Inst Kern & Hadronenphys, D-01314 Dresden, Germany
[9] Tech Univ Dresden, D-01062 Dresden, Germany
[10] Joint Inst Nucl Res, Dubna 141980, Russia
[11] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany
[12] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[13] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[14] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia
[15] Tech Univ Munich, Dept Phys E12, D-85748 Garching, Germany
[16] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus
[17] Inst Phys Nucl Orsay, CNRS, IN2P3, F-91406 Orsay, France
[18] Acad Sci Czech Republ, Inst Nucl Phys, Rez 25068, Czech Republic
[19] Univ Santiago Compostela, Dept Fis Particulas, Santiago De Compostela 15782, Spain
[20] Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia 46971, Spain
来源：
EUROPEAN PHYSICAL JOURNAL A | 2007年 / 31卷 / 04期
关键词：
D O I：
10.1140/epja/i2006-10253-y
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：
e(+) e(-) production was studied using the High Acceptance DiElectron Spectrometer (HADES). In pp collisions at 2.2GeV kinetic beam energy, the exclusive eta production and the Dalitz decay eta ->gamma e(+)e(-) have been reconstructed. The electromagnetic form factor of the latter decay was found to be in good agreement with the existing theoretical predictions. In addition, an inclusive e(+) e(-) invariant-mass spectrum from the C-12 + (12)(C) reaction at 2AGeV is presented and compared with a simplified thermal model.
引用
收藏
页码：831 / 835
页数：5
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