Dilepton and strangeness production probed with HADES

Journal Article · Tue May 15 00:00:00 EDT 2012 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778812050213· OSTI ID:22043736

Rustamov, A ^[1]

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1. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH (Germany)

With the High Acceptance Di-Electron Spectrometer (HADES) at GSI we have studied dilepton production in the few-GeV energy regime in various collisions systems, from elementary NN, over pA, up to the medium-heavy Ar + KCl system. We have thus confirmed the puzzling results of the former DLS Collaboration at the Bevalac. While we have traced the origin of the excess pair yield in CC collisions to elementary pp and pn processes, in our Ar + KCl data a contribution from the dense phase of the collision has been identified. Together with the e{sup +}e{sup -} pairs, we have also obtained in the Ar + KCl system at 1.76 A GeV a high-statistics data set on open and hidden strangeness, i.e. K{sup {+-}}, K{sub s}{sup 0}, {Lambda}, {phi}, and {Xi}{sup -}, allowing for a comprehensive discussion of strangeness production in this system.

• OSTI ID: 22043736
• Journal Information: Physics of Atomic Nuclei, Vol. 75, Issue 5; Other Information: Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEVALAC
CARBON 12 REACTIONS
CARBON 12 TARGET
ELECTRON SPECTROMETERS
ELECTRONS
GEV RANGE
KAONS MINUS
KAONS NEUTRAL SHORT-LIVED
KAONS PLUS
LAMBDA BARYONS
NUCLEAR REACTION YIELD
NUCLEON-NUCLEON INTERACTIONS
PARTICLE PRODUCTION
PHI MESONS
POSITRONS
STRANGENESS
XI BARYONS