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| Hauptseite > Publikationsdatenbank > Formation and lifetime measurements of light hypernuclei in Ag+Ag collisions at $\mathrm{\sqrt{s_{NN}}}$ = 2.55 GeV > print |
| 001 | 365286 | ||
| 005 | 20260310163608.0 | ||
| 024 | 7 | _ | |a 10.48550/ARXIV.2512.12454 |2 doi |
| 037 | _ | _ | |a GSI-2026-00377 |
| 100 | 1 | _ | |a Yassine, R. Abou |b 0 |
| 245 | _ | _ | |a Formation and lifetime measurements of light hypernuclei in Ag+Ag collisions at $\mathrm{\sqrt{s_{NN}}}$ = 2.55 GeV |
| 260 | _ | _ | |c 2025 |b arXiv |
| 336 | 7 | _ | |a Preprint |b preprint |m preprint |0 PUB:(DE-HGF)25 |s 1773156906_2403509 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a WORKING_PAPER |2 ORCID |
| 336 | 7 | _ | |a Electronic Article |0 28 |2 EndNote |
| 336 | 7 | _ | |a preprint |2 DRIVER |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
| 336 | 7 | _ | |a Output Types/Working Paper |2 DataCite |
| 520 | _ | _ | |a We present the first observation of $\mathrm{^{3}_ΛH}$ and $\mathrm{^{4}_ΛH}$ in Ag+Ag collisions at $\mathrm{\sqrt{s_{NN}}}$ = 2.55 GeV, emitted around mid-rapidity. The hypernuclei are reconstructed via their two-body decay channels and identified through their weak-decay topology, employing an artificial neural network for enhanced discrimination. The analysis methodology is validated using $Λ$ hyperons. The resulting rapidity distributions, dN/dy, exhibit a bell shape centered at mid-rapidity. The yield of $\mathrm{^{4}_ΛH}$ is equal to or exceeds that of $\mathrm{^{3}_ΛH}$, which contrasts the measurement from the STAR collaboration at $\mathrm{\sqrt{s_{NN}}}$ = 3 GeV and is consistent with a scenario in which hypernuclei receive feed-down from excited states. The data enable a high-precision measurement of the hypernuclei lifetimes. For the $\mathrm{^{3}_ΛH}$, a lifetime of $\mathrm{τ_{^{3}_ΛH}}$ = $(239 \pm 23{\mathrm{(stat)}} \pm 18{\mathrm{(sys)}})\,\mathrm{ps}$, is extracted, consistent on the 1$σ$ level with that of the free $Λ$. In contrast, the $\mathrm{^{4}_ΛH}$ lifetime of $\mathrm{τ_{^{4}_ΛH}}$ = $(209 \pm 7{\mathrm{(stat)}} \pm 10{\mathrm{(sys)}})\,\mathrm{ps}$, shows a 4.5 $σ$ deviation from the free $Λ$ lifetime. The results consolidate the available world data. |
| 536 | _ | _ | |a 612 - Cosmic Matter in the Laboratory (POF4-612) |0 G:(DE-HGF)POF4-612 |c POF4-612 |f POF IV |x 0 |
| 588 | _ | _ | |a Dataset connected to DataCite |
| 650 | _ | 7 | |a Nuclear Experiment (nucl-ex) |2 Other |
| 650 | _ | 7 | |a High Energy Physics - Experiment (hep-ex) |2 Other |
| 650 | _ | 7 | |a FOS: Physical sciences |2 Other |
| 693 | _ | _ | |a HTD |e S477: Properties of hadron resonances and baryon rich matter (POF3-612; HTD) |1 EXP:(DE-Ds200)HTD-20200803 |0 EXP:(DE-Ds200)S477-20200803 |5 EXP:(DE-Ds200)S477-20200803 |x 0 |
| 700 | 1 | _ | |a Adamczewski-Musch, J. |0 P:(DE-Ds200)OR0005 |b 1 |u gsi |
| 700 | 1 | _ | |a Asal, C. |b 2 |
| 700 | 1 | _ | |a Becker, M. |b 3 |
| 700 | 1 | _ | |a Belounnas, A. |b 4 |
| 700 | 1 | _ | |a Blanco, A. |b 5 |
| 700 | 1 | _ | |a Blume, C. |0 P:(DE-Ds200)OR1508 |b 6 |u gsi |
| 700 | 1 | _ | |a Chlad, L. |b 7 |
| 700 | 1 | _ | |a Chudoba, P. |b 8 |
| 700 | 1 | _ | |a Ciepał, I. |b 9 |
| 700 | 1 | _ | |a Dreyer, J. |b 10 |
| 700 | 1 | _ | |a Esmail, Waleed Ahmed Mohammed |0 P:(DE-Ds200)OR11146 |b 11 |
| 700 | 1 | _ | |a Fabbietti, L. |b 12 |
| 700 | 1 | _ | |a Floersheimer, H. |b 13 |
| 700 | 1 | _ | |a Förtsch, J. |b 14 |
| 700 | 1 | _ | |a Fonte, P. |b 15 |
| 700 | 1 | _ | |a Friese, J. |b 16 |
| 700 | 1 | _ | |a Fröhlich, I. |b 17 |
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| 700 | 1 | _ | |a Kämpfer, B. |b 29 |
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| 773 | _ | _ | |a 10.48550/ARXIV.2512.12454 |p 9 |
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