Subthreshold ϕ meson production in nucleus-nucleus collisions
Part of emission of the negatively charged kaons from the nucleus-nucleus collisions appears to originate from decays of ϕ(1020) mesons into the K+K− channel. We report on the measurement of the emission yield of ϕ mesons in the collisions of Ni+Ni at the beam kinetic energy of 1.91A GeV. The experi...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2014-04-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20147100109 |
| _version_ | 1818871675143323648 |
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| author | Piasecki K. |
| author_facet | Piasecki K. |
| author_sort | Piasecki K. |
| collection | DOAJ |
| description | Part of emission of the negatively charged kaons from the nucleus-nucleus collisions appears to originate from decays of ϕ(1020) mesons into the K+K− channel. We report on the measurement of the emission yield of ϕ mesons in the collisions of Ni+Ni at the beam kinetic energy of 1.91A GeV. The experiment was done with the FOPI spectrometer at the SIS 18 accelerator at GSI, Darmstadt. The total yield of ϕ was found to be (4.5 ± 0.7−1.2+1.8) · 10−4 per triggered event. Ratio of ϕ/K− emission yields was estimated at 0.42±0.13−0.11+0.17, meaning that about 20% of negatively charged kaons emitted from the collision originate from decays of ϕ mesons. The results are in agreement with similar HADES results done for the collisions of Ar+KCl. |
| first_indexed | 2024-12-19T12:26:41Z |
| format | Article |
| id | doaj.art-80837f7b6493404b94a0d4d551f00a99 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-19T12:26:41Z |
| publishDate | 2014-04-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-80837f7b6493404b94a0d4d551f00a992022-12-21T20:21:33ZengEDP SciencesEPJ Web of Conferences2100-014X2014-04-01710010910.1051/epjconf/20147100109epjconf_icnfp2013_00109Subthreshold ϕ meson production in nucleus-nucleus collisionsPiasecki K.0Institute of Experimental Physics, Faculty of Physics, University of WarsawPart of emission of the negatively charged kaons from the nucleus-nucleus collisions appears to originate from decays of ϕ(1020) mesons into the K+K− channel. We report on the measurement of the emission yield of ϕ mesons in the collisions of Ni+Ni at the beam kinetic energy of 1.91A GeV. The experiment was done with the FOPI spectrometer at the SIS 18 accelerator at GSI, Darmstadt. The total yield of ϕ was found to be (4.5 ± 0.7−1.2+1.8) · 10−4 per triggered event. Ratio of ϕ/K− emission yields was estimated at 0.42±0.13−0.11+0.17, meaning that about 20% of negatively charged kaons emitted from the collision originate from decays of ϕ mesons. The results are in agreement with similar HADES results done for the collisions of Ar+KCl.http://dx.doi.org/10.1051/epjconf/20147100109 |
| spellingShingle | Piasecki K. Subthreshold ϕ meson production in nucleus-nucleus collisions EPJ Web of Conferences |
| title | Subthreshold ϕ meson production in nucleus-nucleus collisions |
| title_full | Subthreshold ϕ meson production in nucleus-nucleus collisions |
| title_fullStr | Subthreshold ϕ meson production in nucleus-nucleus collisions |
| title_full_unstemmed | Subthreshold ϕ meson production in nucleus-nucleus collisions |
| title_short | Subthreshold ϕ meson production in nucleus-nucleus collisions |
| title_sort | subthreshold ϕ meson production in nucleus nucleus collisions |
| url | http://dx.doi.org/10.1051/epjconf/20147100109 |
| work_keys_str_mv | AT piaseckik subthresholdphmesonproductioninnucleusnucleuscollisions |