HADES Experiment: Di-Lepton Spectroscopy in p+p (2.2 GeV) and C+C (1 and 2 A GeV) Collisions


HADES Experiment: Di-Lepton Spectroscopy in p+p (2.2 GeV) and C+C (1 and 2 A GeV) Collisions

Przygoda, W.; Agakishiev, G.; Agodi, C.; Alvarez-Pol, H.; Balanda, A.; Bassini, R.; Bellia, G.; Belver, D.; Bielcik, J.; Blanco, A.; Boehmer, M.; Boiano, C.; Bortolotti, A.; Boyard, J.; Brambilla, S.; Braun-Munzinger, P.; Cabanelas, P.; Chernenko, S.; Christ, T.; Coniglione, R.; Dahlinger, M.; Diaz, J.; Djeridi, R.; Dohrmann, F.; Duran, I.; Eberl, T.; Enghardt, W.; Fabbietti, L.; Fateev, O.; Finocchiaro, P.; Fonte, P.; Friese, J.; Froehlich, I.; Garzon, J.; Gernhaeuser, R.; Golubeva, M.; Gonzalez-Diaz, D.; Grosse, E.; Guber, F.; Heinz, T.; Hennino, T.; Hlavac, S.; Hoffmann, J.; Holzmann, R.; Ierusalimov, A.; Iori, I.; Ivashkin, A.; Jaskula, M.; Jurkovic, M.; Kajetanowicz, M.; Kaempfer, B.; Kanaki, K.; Karavicheva, T.; Kirschner, D.; Koenig, I.; Koenig, W.; Kolb, B.; Kopf, U.; Kotte, R.; Kotulic-Bunta, J.; Kruecken, R.; Kugler, A.; Kuehn, W.; Kulessa, R.; Lang, S.; Lehnert, J.; Maier, L.; Maier-Komor, P.; Maiolino, C.; Marin, J.; Markert, J.; Metag, V.; Montes, N.; Moriniere, E.; Mousa, J.; Muench, M.; Muentz, C.; Naumann, L.; Novotny, R.; Novotny, J.; Ott, W.; Otwinowski, J.; Pachmayer, Y.; Perez, T.; Pechenov, V.; Pietraszko, J.; Pinhao, J.; Pleskac, R.; Pospisil, V.; Pullia, A.; Rabin, N.; Ramstein, B.; Riboldi, S.; Ritman, J.; Rosier, P.; Roy-Stephan, M.; Rustamov, A.; Sadovsky, A.; Sailer, B.; Salabura, P.; Sapienza, P.; Schmah, A.; Schoen, W.; Schroeder, C.; Schwab, E.; Senger, P.; Simon, R.; Smolyankin, V.; Smykov, L.; Spataro, S.; Spruck, B.; Stroebele, H.; Stroth, J.; Sturm, C.; Sudol, M.; Tiflov, V.; Tlusty, P.; Toia, A.; Traxler, M.; Tsertos, H.; Turzo, I.; Wagner, V.; Walus, W.; Willmott, C.; Winkler, S.; Wisniowski, M.; Wojcik, T.; Wuestenfeld, J.; Zanevsky, Y.; Zumbruch, P.

The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+e-) spectroscopy in pion, proton and heavy ion induced reactions in the 1-2 A GeV energy range. One of the goals of the HADES experiment is to study in-medium modifications of hadron properties like effective masses, decay widths, electromagnetic form factors etc. Such effects can be probed with vector mesons (rho , omega , phi ) decaying into e+e- channel. The identification of vector mesons by means of a HADES spectrometer is based on invariant mass reconstruction of e+e- pairs. The combined information from all spectrometer sub-detectors is used to reconstruct the di-lepton signal. The recent results from 2.2 GeV p+p, 1 A GeV and 2 A GeV C+C experiments are presented.

Keywords: PACS numbers: 25.75.Dw; 13.60.Le

  • Open Access Logo Acta Physica Polonica B 37(2006)1, 139

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