Measurement of charged pions in C-12+C-12 collisions at 1 A GeV and 2 A GeV with HADES

0338756 - ÚJF 2010 RIV DE eng J - Článek v odborném periodiku
Agakishiev, G. - Agodi, C. - Balanda, A. - Bellia, G. - Belver, D. - Belyaev, A. - Bielčík, Jaroslav - Blanco, A. - Bortolotti, A. - Boyard, J. L. - Braun-Munzinger, P. - Cabanelas, P. - Chernenko, S. - Christ, T. - Coniglione, R. - Destefanis, M. - Díaz, J. - Dohrmann, F. - Duran, I. - Dybczak, A. - Eberl, T. - Fabbietti, L. - Fateev, O. - Ferreira-Marques, R. - Finocchiaro, P. - Fonte, P. - Friese, J. - Frohlich, I. - Galatyuk, T. - Garzón, J.A. - Gernhäuser, R. - Gil, A. - Gilardi, C. - Golubeva, M. - Gonzalez-Diaz, D. - Grosse, E. - Guber, F. - Heilmann, M. - Heinz, T. - Hennino, T. - Holzmann, R. - Ierusalimov, A. - Iori, I. - Ivashkin, A. - Jurkovic, M. - Kämpfer, B. - 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. - Lorenz, M. - Maier, L. - Maiolino, C. - Mangiarotti, A. - Marín, J. - Markert, J. - Metag, V. - Michalska, B. - Michel, J. - Morinière, E. - Mousa, J. - Münch, M. - Muntz, C. - Naumann, L. - Novotny, R. - Otwinowski, J. - Pachmayer, Y. - Palka, M. - Parpottas, Y. - Pechenov, V. - Pechenova, O. - Cavalcanti, T.P. - Piattelli, P. - Pietraszko, J. - Pospíšil, Vladimír - Przygoda, W. - Ramstein, B. - Reshetin, A. - Roy-Stephan, M. - Rustamov, A. - Sadovsky, A. - Sailer, B. - Salabura, P. - Sapienza, P. - Schmah, A. - Schroeder, C. - Schwab, E. - Simon, R. S. - Sobolev, Yuri, G. - Spataro, S. - Spruck, B. - Strobele, H. - Stroth, J. - Sturm, C. - Sudol, M. - Tarantola, A. - Teilab, K. - Tlustý, Pavel - Traxler, M. - Trebacz, R. - Tsertos, H. - Wagner, Vladimír - Weber, M. - Wisniowski, M. - Wojcik, T. - Wuustenfeld, J. - Yurevich, S. - Zanevsky, Yu. - Zhou, P. - Zumbruch, P.
Measurement of charged pions in C-12+C-12 collisions at 1 A GeV and 2 A GeV with HADES.
European Physical Journal A. Roč. 40, č. 1 (2009), s. 45-59. ISSN 1434-6001. E-ISSN 1434-601X
Grant CEP: GA MŠMT LC07050; GA AV ČR IAA100480803
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: HEAVY-ION COLLISIONS * NUCLEUS-NUCLEUS COLLISIONS * PARTICLE-PRODUCTION
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 1.968, rok: 2009

We present the results of a study of charged-pion production in C-12 + C-12 collisions at incident beam energies of 1 A GeV and 2 A GeV using the HADES spectrometer at GSI. The main emphasis of the HADES program is on the dielectron signal from the early phase of the collision. Here, however, we discuss the data with respect to the emission of charged hadrons, specifically the production of pi(+/-) mesons, which are related to neutral pions representing a dominant contribution to the dielectron yield. We have performed the first large-angular-range measurement of the distribution of pi(+/-) mesons for the C-12 + C-12 collision system covering a fairly large rapidity interval. The pion yields, transverse-mass and angular distributions are compared with calculations done within a transport model, as well as with existing data from other experiments. The anisotropy of pion production is systematically analyzed.
Trvalý link: http://hdl.handle.net/11104/0182447