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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2410.13975 |
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| _version_ | 1866916700552691712 |
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| author | Porfy, Barnabas |
| author_facet | Porfy, Barnabas |
| contents | In the recent years, research studies in high-energy physics have confirmed the creation of the strongly interacting quark-gluon plasma (sQGP) in ultra-relativistic nucleus-nucleus collisions. NA61/SHINE at CERN SPS investigates hadronic matter properties by varying collision energy ($\sqrt{s_{\rm{NN}}} \approx 5.3, 6.2, 7.7, 8.8, 12$, and 16.8 GeV) and systems (such as p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb). Utilizing femtoscopic correlations, we can unveil the space-time structure of the hadron emitting source. Our focus is on femtoscopic correlations in small to intermediate systems, comparing measurements with source calculations based on Lévy-distributed sources, to explore the pair transverse mass dependence of the Lévy source parameters. The Lévy exponent $α$ is of particular significance, which characterizes the shape of the source and may be connected to the critical exponent $η$ near the critical point. Our analysis will reveal that the Lévy shape parameter, $α$, has a slight non-monotonic behaviour as a function of collision energy and that we see a deviation from Gaussian sources. Finally, it will be shown that there is no indication of the critical point at any of the investigated energies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_13975 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Femtoscopy using Lévy-distributed sources at NA61/SHINE Porfy, Barnabas Nuclear Experiment High Energy Physics - Experiment In the recent years, research studies in high-energy physics have confirmed the creation of the strongly interacting quark-gluon plasma (sQGP) in ultra-relativistic nucleus-nucleus collisions. NA61/SHINE at CERN SPS investigates hadronic matter properties by varying collision energy ($\sqrt{s_{\rm{NN}}} \approx 5.3, 6.2, 7.7, 8.8, 12$, and 16.8 GeV) and systems (such as p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb). Utilizing femtoscopic correlations, we can unveil the space-time structure of the hadron emitting source. Our focus is on femtoscopic correlations in small to intermediate systems, comparing measurements with source calculations based on Lévy-distributed sources, to explore the pair transverse mass dependence of the Lévy source parameters. The Lévy exponent $α$ is of particular significance, which characterizes the shape of the source and may be connected to the critical exponent $η$ near the critical point. Our analysis will reveal that the Lévy shape parameter, $α$, has a slight non-monotonic behaviour as a function of collision energy and that we see a deviation from Gaussian sources. Finally, it will be shown that there is no indication of the critical point at any of the investigated energies. |
| title | Femtoscopy using Lévy-distributed sources at NA61/SHINE |
| topic | Nuclear Experiment High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2410.13975 |