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

Agakishiev, G.; Álvarez‐Pol, H.; Bałanda, A.; Bassini, R.; Böhmer, M.; Bokemeyer, H.; Boyard, J. L.; Cabanelas, P.; Chernenko, S.; Christ, T.; Destefanis, M.; Dohrmann, F.; Dybczak, A.; Eberl, T.; Fabbietti, L.; Fateev, O.; Finocchiaro, P.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J. A.; Gernhäuser, R.; Gilardi, C.; Golubeva, M.; González-Díaz, D.; Guber, F.; Gumberidze, M.; Hennino, T.; Holzmann, R.; Ierusalimov, A.; Iori, I.; Jurković, M.; Kämpfer, B.; Kanaki, K.; Karavicheva, T.; Köenig, I.; Koenig, W.; Kolb, B. W.; Kötte, R.; Kożuch, A.; Kühn, W.; Куглер, А.; Kurepin, A.; Lang, S.; Lapidus, K.; Liu, T.; Maier, L.; Markert, J.; Metag, V.; Michalska, B.; Morinière, E.; Mousa, J.; Münch, C.; Müntz, C.; Naumann, L.; Otwinowski, J.; Pachmayer, Y.; Pechenov, V.; Pechenova, O.; Cavalcanti, T. Pérez; Pietraszko, J.; Pospíšil, V.; Przygoda, W.; Ramstein, B.; Reshetin, A.; Roy‐Stéphan, M.; Rustamov, A.; Sadovsky, A.; Sailer, B.; Salabura, P.; Sanchez, M. C.; Schmah, A.; Schwab, E.; Sobolev, Yu. G.; Spataro, S.; Spruck, B.; Ströbele, H.; Stroth, J.; Sturm, C.; Tarantola, A.; Teilab, K.; Tlustý, P.; Toia, A.; Traxler, M.; Trębacz, R.; Tsertos, H.; Wagner, V.; Wiśniowski, M.; Wójcik, Tomasz; Wüstenfeld, J.; Yurevich, S.; Zanevsky, Y.; Zumbruch, P.

doi:10.1103/physrevc.85.054005

Cited by 26 publications

(12 citation statements)

References 28 publications

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“…Results for three different systems are shown: proton-proton, neutron-proton and π-proton. For the sake of data comparison, the same energies as measured by HADES were chosen [18][19][20]. Results for the pion beam are not published yet, so predictions, which are not filtered for acceptance, are shown.…”

Section: A Elementary Collisionsmentioning

confidence: 99%

“…6 and Fig. 7 show the dilepton invariant mass spectrum for the two lower energies in comparison to HADES data [18,19].…”

Section: Ppmentioning

confidence: 99%

“…Both also report an enhancement in the dilepton invariant mass range from 0.30 to 0.76 GeV that is again attributed to a broadening of the ρ spectral function. The present work focuses on the dielectron production in the kinematic regime of beam energies of E Kin = 1 − 3.5A GeV, which is covered by the HADES experiment [18][19][20][21][22][23][24] at the GSI facility. The HADES results confirmed previous measurements from the DLS collaboration [25].…”

Section: Introductionmentioning

confidence: 99%

“…Invariant mass spectrum of dielectrons produced in pp collisions at EKin = 2.2 GeV. Experimental data from[19].…”

mentioning

confidence: 99%

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Dilepton production and resonance properties within a new hadronic transport approach in the context of the GSI-HADES experimental data

et al. 2018

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The dilepton emission in heavy-ion reactions at low beam energies is examined within a hadronic transport approach. In this article, the production of electron-positron pairs from a new approach named SMASH (Simulating Many Accelerated Strongly-interacting Hadrons) is introduced. The dilepton emission below the hadronic invariant mass threshold is taken into account for all direct vector meson decays. The calculations are systematically confronted with HADES data in the kinetic-energy range of 1 − 3.5A GeV for elementary, proton-nucleus and nucleus-nucleus reactions. The present approach employing a resonance treatment based on vacuum properties is validated by an excellent agreement with experimental data up to system sizes of carbon-carbon collisions. After establishing this well-understood baseline in elementary and small systems, medium effects are investigated with a coarse-graining approach based on the same hadronic evolution. The effect of in-medium modifications to the vector meson spectral functions is important for dilepton invariant mass spectra in ArKCl and larger systems, even though the transport approach with vacuum properties reveals similar features due the coupling to baryonic resonances and the intrinsically included collisional broadening. This article provides a comprehensive comparison of our calculations with published dielectron results from the HADES collaboration. In addition, the emission of dileptons in gold-gold and pion-beam experiments, for which results are expected, is predicted.

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Section: A Elementary Collisionsmentioning

confidence: 99%

“…6 and Fig. 7 show the dilepton invariant mass spectrum for the two lower energies in comparison to HADES data [18,19].…”

Section: Ppmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Invariant mass spectrum of dielectrons produced in pp collisions at EKin = 2.2 GeV. Experimental data from[19].…”

mentioning

confidence: 99%

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Dilepton production and resonance properties within a new hadronic transport approach in the context of the GSI-HADES experimental data

et al. 2018

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“…Measurements of a reference spectra from elementary reactions, i.e. pp and np, are used to estimate the contribution of the first chance collisions [1,2,3]. Mesons with a long lifetime (long compared to the lifetime of the fireball), i.e.…”

Section: Heavy-ion Collisionsmentioning

confidence: 99%