Publication
Deep sub-threshold $\phi$ production in Au+Au collisions
| dc.contributor.author | HADES collaboration (114 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 | 2019-02-04T12:37:10Z | |
| dc.date.available | 2019-02-04T12:37:10Z | |
| dc.date.issued | 2018-03-10 | |
| dc.date.updated | 2019-02-04T12:37:10Z | |
| dc.description.abstract | We present data on charged kaons (K+-) and {\phi} mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K and {\phi} mesons in central heavy-ion collisions below a kinetic beam energy of 10A GeV. The {\phi}/K- multiplicity ratio is found to be surprisingly high with a value of 0.52 +- 0.16 and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K- transverse-mass spectra can be explained solely by feed- down, which substantially softens the spectra of K- mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze- out temperatures of K+ and K- mesons caused by different couplings to baryons. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B778 (2018) 403-407 Physics Letters B 778 (2018) 403-407; DOI 10.1016/j.physletb.2018.01.048 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2018.01.048 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27313 | |
| dc.language.iso | eng | |
| dc.title | Deep sub-threshold $\phi$ production in Au+Au collisions | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |