Dielectron production in Ar plus KCl collisions at 1.76A GeV

0365337 - ÚJF 2012 RIV US eng J - Článek v odborném periodiku
Agakishiev, G. - Balanda, A. - Belver, D. - Belyaev, A. - Blanco, A. - Boehmer, M. - Boyard, J. L. - Cabanelas, P. - Castro, E. - Chernenko, S. - Christ, T. - Destefanis, M. - Dohrmann, F. - Dybczak, A. - Eberl, T. - Epple, E. - Fabbietti, L. - Fateev, O. - Finocchiaro, P. - Krása, Antonín - Křížek, Filip - Kugler, Andrej - Tlustý, Pavel … celkem 104 autorů
Dielectron production in Ar plus KCl collisions at 1.76A GeV.
Physical Review. C. Roč. 84, č. 1 (2011), 014902/1-014902/15. ISSN 0556-2813
Grant CEP: GA MŠMT LC07050; GA AV ČR IAA100480803
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: HEAVY-ION COLLISIONS * NUCLEON-NUCLEON INTERACTIONS * PRODUCTION CROSS-SECTIONS * DILEPTON PRODUCTION * ENERGIES
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 3.308, rok: 2011

We present results on dielectron production in (40)Ar + KCl collisions at 1.76A GeV. For the first time. mesons could be reconstructed in a heavy-ion reaction at a bombarding energy which is well below the production threshold in free nucleon-nucleon collisions. The. multiplicity has been extracted and compared to the yields of other particles, in particular of the phi meson. At intermediate e(+) e(-) invariant masses, we find a strong enhancement of the pair yield over a reference spectrum from elementary nucleon-nucleon reactions, suggesting the onset of nontrivial effects of the nuclear medium.
Trvalý link: http://hdl.handle.net/11104/0200601