Publication
$\Delta$(1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI
| dc.contributor.author | HADES collaboration (119 authors) | |
| dc.contributor.author | Blanco, A. | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Fonte, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Lopes, L. | |
| dc.contributor.author | Mangiarotti, A. | |
| dc.contributor.author | Ramos, S. | |
| dc.contributor.author | Silva, L. | |
| dc.date.accessioned | 2019-02-04T12:36:53Z | |
| dc.date.available | 2019-02-04T12:36:53Z | |
| dc.date.issued | 2017-06-12 | |
| dc.date.updated | 2019-02-04T12:36:53Z | |
| dc.description.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. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Rev. C95 (2017) 065205; DOI 10.1103/PhysRevC.95.065205 | |
| dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevC.95.065205 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27312 | |
| dc.language.iso | eng | |
| dc.title | $\Delta$(1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |