Abstract
φ and K- mesons from Ni+Ni collisions at the beam energy of 1.91A GeV have been measured by the FOPI spectrometer, with a trigger selecting central and semicentral events amounting to 52% of the total cross section. The phase-space distributions, and the total yield of K-, as well as the kinetic energy distribution and the total yield of φ mesons are presented. The φ/ K- ratio is found to be 0.44±0.07(stat)-0.10+0.16(syst), meaning that about 22% of K- mesons originate from the decays of φ mesons, occurring mostly in vacuum. The inverse slopes of direct kaons are up to about 15 MeV larger than the ones extracted within the one-source model, signaling that a considerable share of gap between the slopes of K+ and K- could be explained by the contribution of φ mesons to negative kaons.
| Original language | English |
|---|---|
| Article number | 054904 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 91 |
| Issue number | 5 |
| DOIs | |
| State | Published - 13 May 2015 |
Fingerprint
Dive into the research topics of 'Influence of φ mesons on negative kaons in Ni + Ni collisions at 1.91A GeV beam energy INFLUENCE of φ MESONS on NEGATIVE KAONS in ⋯ K. PIASECKI et al.'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver