Statistical properties of non-flow correlations in pp and heavy-ion collisions at RHIC energies
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866917295586017280 |
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| author | Nayak, Satya Ranjan Das, Akash Singh, B. K. |
| author_facet | Nayak, Satya Ranjan Das, Akash Singh, B. K. |
| contents | In this work, we have studied the two-particle cumulant in pp, d-Au, and Au-Au collisions. The two-particle cumulant was treated as an event-by-event distribution, and its skewness and kurtosis were analyzed. The non-flow correlations, like jets and decays, constantly produced a skewed distribution, regardless of the model used. On the contrary, HYDJET++ produced a smooth Gaussian distribution at higher $η$ windows in fixed impact parameter collisions. The skewness increased consistently for higher $η$ windows in all non-QGP models like PYTHIA, PHOJET, QGSJET, and DPMJET. The kurtosis of the distribution also increased with $η$ windows in non-QGP models. The skewness and kurtosis of the distributions produced by HYDJET++ decreased with $Δη$ and eventually reached zero at higher $Δη$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_22686 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Statistical properties of non-flow correlations in pp and heavy-ion collisions at RHIC energies Nayak, Satya Ranjan Das, Akash Singh, B. K. Nuclear Theory High Energy Physics - Phenomenology In this work, we have studied the two-particle cumulant in pp, d-Au, and Au-Au collisions. The two-particle cumulant was treated as an event-by-event distribution, and its skewness and kurtosis were analyzed. The non-flow correlations, like jets and decays, constantly produced a skewed distribution, regardless of the model used. On the contrary, HYDJET++ produced a smooth Gaussian distribution at higher $η$ windows in fixed impact parameter collisions. The skewness increased consistently for higher $η$ windows in all non-QGP models like PYTHIA, PHOJET, QGSJET, and DPMJET. The kurtosis of the distribution also increased with $η$ windows in non-QGP models. The skewness and kurtosis of the distributions produced by HYDJET++ decreased with $Δη$ and eventually reached zero at higher $Δη$. |
| title | Statistical properties of non-flow correlations in pp and heavy-ion collisions at RHIC energies |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.22686 |