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

0321344 - ÚJF 2009 RIV NL eng J - Journal Article
Agakishiev, G. - Agodi, C. - Alvarez-Pol, H. - Balanda, A. - Bassini, R. - Bellia, G. - Belver, D. - Belyaev, A. - Blanco, A. - Böhmer, M. - Bortolotti, A. - Boyard, J. L. - Braun-Munzinger, P. - Cabanelas, P. - Castro, E. - Chernenko, S. - Christ, T. - Destefanis, M. - Díaz, J. - Dohrmann, F. - Dybczak, A. - Eberl, T. - Fabbietti, L. - Fateev, O. - Finocchiaro, P. - Fonte, P. - Friese, J. - Frohlich, I. - Galatyuk, T. - Garzón, J.A. - Gernhäuser, R. - Gil, A. - Gilardi, C. - Golubeva, M. - González-Díaz, D. - Grosse, E. - Guber, F. - Heilmann, M. - Heinz, T. - Hennino, T. - Holzmann, R. - Ierusalimov, A. - Iori, I. - Ivashkin, A. - Jurkovic, M. - Kämpfer, B. - Kajetanowicz, M. - Kanaki, K. - Karavicheva, T. - Kirschner, D. - Koenig, I. - Koenig, W. - Kolb, B.W. - Kotte, R. - Kozuch, A. - Krása, Antonín - Křížek, Filip - Krücken, R. - Kuhn, W. - Kugler, Andrej - Kurepin, A. - Lamas-Valverde, J. - Lang, S. - Lange, J.S. - Lapidus, K. - Lopes, L. - Maier, L. - Mangiarotti, A. - Marín, J. - Markert, J. - Metag, V. - Michalska, B. - Mishra, D. - Moriniére, E. - Mousa, J. - Münch, M. - Muntz, C. - Naumann, L. - Novotny, R. - Otwiniwski, J. - Pachmayer, Y.C. - Palka, M. - Parpottas, Y. - Pechenov, V. - Pechenova, O. - Pérez Cavalcanti, T. - Petriaszko, J. - Pleskač, Radek - Pospíšil, V. - Przygoda, W. - Ramstein, B. - Reshetin, A. - Roy Stephan, M. - Rustamov, A. - Sadovsky, A. - Sailer, B. - Salabura, P. - Schmah, A. - Schroeder, C. - Schwab, E. - Simon, R. S. - Sobolev, Yu. G. - Spataro, S. - Spruck, B. - Strobele, H. - Stroth, J. - Sturm, C. - Sudol, M. - Tarantola, A. - Teilab, K. - Tlustý, Pavel - Toia, A. - Traxler, M. - Trebacz, R. - Tsertos, H. - Veretenkin, I. - Wagner, Vladimír - Weber, M. - Wen, H. - Wisniowski, M. - Wojcik, T. - Wistenfeld, J. - Yurevich, S. - Zanevsky, Yu. - Zhou, P. - Zumbruch, P.
Study of dielectron production in C+C collisions at 1 A GeV.
[Studium produkce dielektronů ve srážkách C+C při kinetické.]
Physics Letters. B. Roč. 663, 1-2 (2008), s. 43-48. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA AV ČR IAA100480803; GA MŠMT LC07050
Institutional research plan: CEZ:AV0Z10480505
Keywords : dilepton spectroscopy * heavy-ion reactions * excess yield
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 4.034, year: 2008

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 π0-Dalitz to the ρ/ω 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.

Článek se zabývá produkcí e+e- párů ve srážkách C+C při kinetické energii svazku 1 AGeV. Spektra párů naměřená spektrometrem HADES jsou v dobrém souhlase s daty získanými ze spektrometru DLS.
Permanent Link: http://hdl.handle.net/11104/0169925