Beam energy dependence of triton production and yield ratio (Nt×Np/N2d) in Au+Au collisions at RHIC
We report the triton (t) production in midrapidity (|y|<0.5) Au+Au collisions at √sNN=7.7-200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider. The nuclear compound yield ratio (Nt×Np/N2d), which is predicted to be sensitive t...
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| Main Authors: | , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2023
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| In: |
Physical review letters
Year: 2023, Volume: 130, Issue: 20, Pages: 1-9 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.130.202301 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.130.202301 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.130.202301 
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| Author Notes: | STAR Collaboration* |
| Summary: | We report the triton (t) production in midrapidity (|y|<0.5) Au+Au collisions at √sNN=7.7-200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider. The nuclear compound yield ratio (Nt×Np/N2d), which is predicted to be sensitive to the fluctuation of local neutron density, is observed to decrease monotonically with increasing charged-particle multiplicity (dNch/dη) and follows a scaling behavior. The dNch/dη dependence of the yield ratio is compared to calculations from coalescence and thermal models. Enhancements in the yield ratios relative to the coalescence baseline are observed in the 0%-10% most central collisions at 19.6 and 27 GeV, with a significance of 2.3σ and 3.4σ, respectively, giving a combined significance of 4.1σ. The enhancements are not observed in peripheral collisions or model calculations without critical fluctuation, and decreases with a smaller pT acceptance. The physics implications of these results on the QCD phase structure and the production mechanism of light nuclei in heavy-ion collisions are discussed. |
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| Item Description: | Veröffentlicht: 16. Mai 2023 *STAR Collaboration: M.I. Abdulhamid, I.M. Deppner, Y.H. Leung, Y. Söhngen, P.C. Weidenkaff [und 352 weitere Personen] Im Titel sind die Buchstaben t, p und d tiefgestellt, die Zahl 2 ist hochgestellt Gesehen am 24.08.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.130.202301 |