Publication
Investigating hadronic resonances in pp interactions with HADES
| dc.contributor.author | HADES collaboration (105 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 | Silva, L. | |
| dc.date.accessioned | 2019-02-04T07:12:50Z | |
| dc.date.available | 2019-02-04T07:12:50Z | |
| dc.date.issued | 2015-06-22 | |
| dc.date.updated | 2019-02-04T07:12:50Z | |
| dc.description.abstract | In this paper we report on the investigation of baryonic resonance production in proton-proton collisions at the kinetic energies of 1.25 GeV and 3.5 GeV, based on data measured with HADES. Exclusive channels nppi^+ and pppi^0 as well as ppe^+e^- were studied simultaneously in the framework of a one-boson exchange model. The resonance cross sections were determined from the one-pion channels for Delta(1232) and N(1440) (1.25 GeV) as well as further Delta and N* resonances up to 2 GeV/c^2 for the 3.5 GeV data. The data at 1.25 GeV energy were also analysed within the framework of the partial wave analysis together with the set of several other measurements at lower energies. The obtained solutions provided the evolution of resonance production with the beam energy, showing a sizeable non-resonant contribution but with still dominating contribution of Delta(1232)P_33. In the case of 3.5 GeV data, the study of the ppe^+e^- channel gave the insight on the Dalitz decays of the baryon resonances and, in particular, on the electromagnetic transition form-factors in the time-like region. We show that the assumption of a constant electromagnetic transition form-factors leads to underestimation of the yield in the dielectron invariant mass spectrum below the vector mesons pole. On the other hand, a comparison with various transport models shows the important role of intermediate rho production, though with a large model dependency. The exclusive channels analysis done by the HADES collaboration provides new stringent restrictions on the parameterizations used in the models. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | EPJ Web Conf. 97 (2015) 00024; DOI 10.1051/epjconf/20159700024 | |
| dc.identifier.uri | http://dx.doi.org/10.1051/epjconf/20159700024 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26868 | |
| dc.language.iso | eng | |
| dc.title | Investigating hadronic resonances in pp interactions with HADES | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |