Inclusive Dielectron Production in Ar+KCl Collisions at 1.76 AGeV studied with HADES
The HADES Collaboration, F. Krizek, G. Agakishiev, A. Balanda, G. Bellia, D. Belver, A. Belyaev, A. Blanco, M. Boehmer, J. L. Boyard, P. Braun-Munzinger, P. Cab… 展开作者
The HADES Collaboration, F. Krizek, G. Agakishiev, A. Balanda, G. Bellia, D. Belver, A. Belyaev, A. Blanco, M. Boehmer, J. L. Boyard, P. Braun-Munzinger, P. Cabanelas, E. Castro, S. Chernenko, T. Christ, M. Destefanis, J. Diaz, F. Dohrmann, A. Dybczak, L. Fabbietti, O. Fateev, P. Finocchiaro, P. Fonte, J. Friese, I. Froehlich, T. Galatyuk, J. A. Garzon, R. Gernhaeuser, A. Gil, C. Gilardi, M. Golubeva, D. Gonzalez-Diaz, E. Grosse, F. Guber, M. Heilmann, T. Hennino, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jurkovic, B. Kaempfer, K. Kanaki, T. Karavicheva, D. Kirschner, I. Koenig, W. Koenig, B. W. Kolb, R. Kotte, A. Kozuch, A. Krasa, R. Kruecken, W. Kuehn, A. Kugler, A. Kurepin, J. Lamas-Valverde, S. Lang, J. S. Lange, K. Lapidus, T. Liu, L. Lopes, M. Lorenz, L. Maier, A. Mangiarotti, J. Marin, J. Markert, V. Metag, B. Michalska, J. Michel, D. Mishra, E. Moriniere, J. Mousa, C. Muentz, L. Naumann, R. Novotny, J. Otwinowski, Y. C. Pachmayer, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, T. Perez Cavalcanti, J. Pietraszko, W. Przygoda, B. Ramstein, A. Reshetin, A. Rustamov, A. Sadovsky, P. Salabura, A. Schmah, R. Simon, Yu. G. Sobolev, S. Spataro, B. Spruck, H. Stroebele, J. Stroth, C. Sturm, M. Sudol, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, R. Trebacz, H. Tsertos, I. Veretenkin, V. Wagner, M. Weber, M. Wisniowski, J. Wuestenfeld, S. Yurevich, Y. Zanevsky, P. Zhou, P. Zumbruch
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4 pages, 3 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
Results of the HADES measurement of inclusive dielectron production in Ar+KCl collisions at a kinetic beam energy of 1.76 AGeV are presented. For the first time, high mass resolution spectroscopy was performed. The invariant mass spectrum of dielectrons is compared with predictions of UrQMD and HSD transport codes.
Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES
Sub-threshold $ϕ$ and $Ξ^-$ production by high mass resonances with UrQMD
我们提出了一个可能的解释深亚阈值，$ϕ$和$Ξ^-$生产与HADES实验测量在Ar+KCl反应在$E_{\mathrm{lab}}=1.76$ A GeV的产量和目前的预测金+金反应在$E_{\mathrm{lab}}=1.23$ A GeV。为了解释$ϕ$和$Ξ^-$强子令人惊讶的高产率，我们提出了新的衰变通道的高质量重子共振。这些新的衰变通道受到基本$\mathrm{p+p}\rightarrow \mathrm{p+p+}ϕ$横截面和p+Nb中$Ξ^-$产生的限制。基于对基元反应的拟合，得到了深亚阈Ar+KCl反应中$ϕ$和$Ξ^-$产生的满意描述，以及在冷核物质中质子诱导$ϕ$产生的核透明比。结果表明，低能核碰撞中罕见的奇异粒子产生数据不需要新的介质效应来描述。
