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

• DOI: 10.1016/j.physletb.2008.03.062
• Publication Date: 2008-04-08T15:18:56Z
• Authors: G. Agakishiev; C. Agodi; H. Alvarez-Pol; A. Balanda; R. Bassini; G. Bellia; D. Belver; A. Belyaev; A. Blanco; M. Böhmer; A. Bortolotti; J.L. Boyard; P. Braun-Munzinger; P. Cabanelas; E. Castro; S. Chernenko; T. Christ; M. Destefanis; J. Díaz; F. Dohrmann; A. Dybczak; T. Eberl; L. Fabbietti; O. Fateev; P. Finocchiaro; P. Fonte; J. Friese; I. Fröhlich; T. Galatyuk; J.A. Garzón; R. Gernhäuser; A. Gil; C. Gilardi; M. Golubeva; D. González-Díaz; E. Grosse; F. Guber; M. Heilmann; T. Heinz; T. Hennino; R. Holzmann; A. Ierusalimov; I. Iori; A. Ivashkin; M. Jurkovic; B. Kämpfer; M. Kajetanowicz; K. Kanaki; T. Karavicheva; D. Kirschner; I. Koenig; W. Koenig; B.W. Kolb; R. Kotte; A. Kozuch; A. Krása; F. Krizek; R. Krücken; W. Kühn; A. Kugler; A. Kurepin; J. Lamas-Valverde; S. Lang; J.S. Lange; K. Lapidus; L. Lopes; L. Maier; A. Mangiarotti; J. Marín; J. Markert; V. Metag; B. Michalska; D. Mishra; E. Morinière; J. Mousa; M. Münch; C. Müntz; L. Naumann; R. Novotny; J. Otwinowski; Y.C. Pachmayer; M. Palka; Y. Parpottas; V. Pechenov; O. Pechenova; T. Pérez Cavalcanti; J. Pietraszko; R. Pleskac; V. Pospísil; W. Przygoda; B. Ramstein; A. Reshetin; M. Roy-Stephan; A. Rustamov; A. Sadovsky; B. Sailer; P. Salabura; A. Schmah; C. Schroeder; E. Schwab; R.S. Simon; Yu.G. Sobolev; S. Spataro; B. Spruck; H. Ströbele; J. Stroth; C. Sturm; M. Sudol; A. Tarantola; K. Teilab; P. Tlusty; A. Toia; M. Traxler; R. Trebacz; H. Tsertos; I. Veretenkin; V. Wagner; M. Weber; H. Wen; M. Wisniowski; T. Wojcik; J. Wüstenfeld; S. Yurevich; Y. Zanevsky; P. Zhou; P. Zumbruch
• Keywords: 13.40.Hq; [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex]; 25.75.-q; 25.75.-q, 25.75.Dw, 13.40.Hq; excess yield; FOS: Physical sciences; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]; 25.75.-q; 25.75.Dw; 13.40.Hq; Excitation function; 7. Clean energy; 01 natural sciences; Heavy-ion reactions; Dilepton spectroscopy; excitation function; 25.75.Dw; 0103 physical sciences; heavy-ion reactions; Nuclear Experiment (nucl-ex); Excess yield; DLS puzzle; Nuclear Experiment

submitted to Physics Letters B<br/>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 pi0-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.<br/>