Observation of the $Ω$(2012) baryon at the LHC
Fuente:
arXiv
Salvato in:
| Autore principale: | |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866918204684632064 |
|---|---|
| author | ALICE Collaboration |
| author_facet | ALICE Collaboration |
| contents | A signal consistent with the $Ω$(2012) baryon has been observed with a significance of $15σ$ in pp collisions at $\sqrt{s}=13$ TeV at the LHC. In this paper, the analysis technique is described and measurements of the mass and width of the $Ω$(2012) are reported, along with the first measurement of its transverse-momentum spectrum and yield. This paper corroborates the observation by Belle of this excited $Ω$ state and the observation that the $Ω$(2012) has a rather narrow width for a strongly decaying resonance. The yield measurement is combined with a statistical thermal model calculation of strange baryon yield ratios to obtain estimates of the $Ω{\rm (2012)}^{-} \rightarrow Ξ\overline{\rm K}$ branching ratios. These results will improve our understanding of the internal structure and mass spectrum of excited baryon states and serve as a baseline for searches regarding modifications of these properties in high-temperature media. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_18063 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of the $Ω$(2012) baryon at the LHC ALICE Collaboration High Energy Physics - Experiment Nuclear Experiment A signal consistent with the $Ω$(2012) baryon has been observed with a significance of $15σ$ in pp collisions at $\sqrt{s}=13$ TeV at the LHC. In this paper, the analysis technique is described and measurements of the mass and width of the $Ω$(2012) are reported, along with the first measurement of its transverse-momentum spectrum and yield. This paper corroborates the observation by Belle of this excited $Ω$ state and the observation that the $Ω$(2012) has a rather narrow width for a strongly decaying resonance. The yield measurement is combined with a statistical thermal model calculation of strange baryon yield ratios to obtain estimates of the $Ω{\rm (2012)}^{-} \rightarrow Ξ\overline{\rm K}$ branching ratios. These results will improve our understanding of the internal structure and mass spectrum of excited baryon states and serve as a baseline for searches regarding modifications of these properties in high-temperature media. |
| title | Observation of the $Ω$(2012) baryon at the LHC |
| topic | High Energy Physics - Experiment Nuclear Experiment |
| url | https://arxiv.org/abs/2502.18063 |