Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy
G. Agakishiev, H. Alvarez-Pol, A. Balanda, R. Bassini, M. B\"ohmer, H., Bokemeye, J. L. Boyard, P. Cabanelas, S. Chernenko, T. Christ, M. Destefanis,, F. Dohrmann, A. Dybczak, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro,, J. Friese, I. Fr\"ohlich, T. Galatyuk
TL;DR
This paper reports on inclusive dielectron production in proton-proton collisions at 2.2 GeV, comparing experimental data with simulations and previous measurements, revealing an excess yield around 0.5 GeV/c2.
Contribution
It provides new measurements of dielectron production at 2.2 GeV and compares them with existing data and simulations, highlighting an excess in the invariant mass distribution.
Findings
Observed excess dielectron yield around 0.5 GeV/c2
Measured inclusive cross sections for neutral pion and eta production
Compared results with previous DLS and HADES data
Abstract
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.
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