DILEPTON PRODUCTION STUDIED WITH THE HADES SPECTROMETER

0366159 - ÚJF 2012 RIV SG eng J - Článek v odborném periodiku
Rustamov, A. - Agakishiev, G. - Balanda, A. - Krása, Antonín - Křížek, Filip - Kugler, Andrej - Tlustý, Pavel - Wagner, Vladimír … celkem 100 autorů
DILEPTON PRODUCTION STUDIED WITH THE HADES SPECTROMETER.
International Journal of Modern Physics. A. Roč. 26, 3-4 (2011), s. 384-389. ISSN 0217-751X. E-ISSN 1793-656X.
[11th International Workshop on Meson Production, Properties and Interaction. Krakow, 10.06.2010-15.06.2010]
Grant CEP: GA AV ČR IAA100480803
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: Dilepton spectroscopy * meson production * nucleus-nucleus collisions
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 1.053, rok: 2011

With the HADES spectrometer at GSI we have studied dilepton production in various collision systems from elementary N+N, over p+A, up to the medium-heavy Ar+KCl system. We have confirmed the puzzling results of the former DLS collaboration at the Bevalac. While we have traced the origin of the excess pair yield in C+C collisions to elementary p+p and n+p processes, we find a significant contribution from the dense phase of the collision in larger Ar+KCl system. From recently obtained e(+)e(-) pair spectra in p+p and p+Nb interactions at 3.5 GeV kinetic beam energy the inclusive production cross sections for neutral pions, eta, omega and rho mesons are extracted for the first time at this beam energy.
Trvalý link: http://hdl.handle.net/11104/0201233