Hrsg.: HADES Collaboration (2017)
Δ(1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI.
In: Physical Review C, 95 (6)
doi: 10.1103/PhysRevC.95.065205
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report on the investigation of Δ(1232) production and decay in proton-proton collisions at a kinetic energy of 1.25 GeV measured with HADES. Exclusive dilepton decay channels ppe+e− and ppe+e−γ have been studied and compared with the partial-wave analysis of the hadronic ppπ0 channel. They allow to access both Δ+→pπ0(e+e−γ) and Δ+→pe+e− Dalitz decay channels. The perfect reconstruction of the well-known π0 Dalitz decay serves as a proof of the consistency of the analysis. The Δ Dalitz decay is identified for the first time and the sensitivity to N−Δ transition form factors is tested. The Δ(1232) Dalitz decay branching ratio is also determined for the first time; our result is (4.19 ± 0.62 syst. ± 0.34 stat.) ×10−5, albeit with some model dependence.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Art des Eintrags: | Bibliographie |
| Titel: | Δ(1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Juni 2017 |
| Verlag: | APS |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review C |
| Jahrgang/Volume einer Zeitschrift: | 95 |
| (Heft-)Nummer: | 6 |
| DOI: | 10.1103/PhysRevC.95.065205 |
| Kurzbeschreibung (Abstract): | We report on the investigation of Δ(1232) production and decay in proton-proton collisions at a kinetic energy of 1.25 GeV measured with HADES. Exclusive dilepton decay channels ppe+e− and ppe+e−γ have been studied and compared with the partial-wave analysis of the hadronic ppπ0 channel. They allow to access both Δ+→pπ0(e+e−γ) and Δ+→pe+e− Dalitz decay channels. The perfect reconstruction of the well-known π0 Dalitz decay serves as a proof of the consistency of the analysis. The Δ Dalitz decay is identified for the first time and the sensitivity to N−Δ transition form factors is tested. The Δ(1232) Dalitz decay branching ratio is also determined for the first time; our result is (4.19 ± 0.62 syst. ± 0.34 stat.) ×10−5, albeit with some model dependence. |
| Zusätzliche Informationen: | Art.No.: 065205 |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Untersuchung von Quark-Materie mit virtuellen Photonen |
| Hinterlegungsdatum: | 26 Feb 2024 15:18 |
| Letzte Änderung: | 23 Apr 2024 17:45 |
| PPN: | 517422263 |
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