Publication
Partial Wave Analysis of the Reaction $p(3.5 GeV)+p \to pK^+\Lambda$ to Search for the "$ppK^-$" Bound State
| dc.contributor.author | HADES collaboration (96 authors) | |
| dc.contributor.author | Blanco, A. | |
| dc.contributor.author | Fonte, P. | |
| dc.contributor.author | Lopes, L. | |
| dc.contributor.author | Mangiarotti, A. | |
| dc.date.accessioned | 2019-02-04T05:19:00Z | |
| dc.date.available | 2019-02-04T05:19:00Z | |
| dc.date.issued | 2015-03-06 | |
| dc.date.updated | 2019-02-04T05:19:00Z | |
| dc.description.abstract | Employing the Bonn–Gatchina partial wave analysis framework (PWA), we have analyzed HADES data of the reaction p(3.5 GeV)+p→pK+Λ . This reaction might contain information about the kaonic cluster “ ppK− ” (with quantum numbers JP=0− and total isospin I=1/2 ) via its decay into pΛ . Due to interference effects in our coherent description of the data, a hypothetical K¯NN (or, specifically “ ppK− ”) cluster signal need not necessarily show up as a pronounced feature (e.g. a peak) in an invariant mass spectrum like pΛ . Our PWA analysis includes a variety of resonant and non-resonant intermediate states and delivers a good description of our data (various angular distributions and two-hadron invariant mass spectra) without a contribution of a K¯NN cluster. At a confidence level of CLs=95% such a cluster cannot contribute more than 2–12% to the total cross section with a pK+Λ final state, which translates into a production cross-section between 0.7 μb and 4.2 μb, respectively. The range of the upper limit depends on the assumed cluster mass, width and production process. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B742 (2015) 242-248; DOI 10.1016/j.physletb.2015.01.032 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2015.01.032 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26716 | |
| dc.language.iso | eng | |
| dc.title | Partial Wave Analysis of the Reaction $p(3.5 GeV)+p \to pK^+\Lambda$ to Search for the "$ppK^-$" Bound State | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |