Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Physical Review C (Impact Factor: 3.73). 03/2012; 85(5). DOI: 10.1103/PhysRevC.85.054005
Source: arXiv


Data on inclusive dielectron production are presented for the reaction p+p at
2.2 GeV measured with the High Acceptance DiElectron Spectrometer (HADES). Our
results supplement data obtained earlier in this bombarding energy regime by
DLS and HADES. The comparison with the 2.09 GeV DLS data is discussed. The
reconstructed e+e- distributions are confronted with simulated pair cocktails,
revealing an excess yield at invariant masses around 0.5 GeV/c2. Inclusive
cross sections of neutral pion and eta production are obtained.