Reconstruction of the Impact Parameter in Nucleus-Nucleus Collisions at the MPD Experiment
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866913161441968128 |
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| author | Idrisov, D. Guber, F. Karpushkin, N. Parfenov, P. |
| author_facet | Idrisov, D. Guber, F. Karpushkin, N. Parfenov, P. |
| contents | Event classification by centrality is one of the key tasks of the MPD (Multi-Purpose Detector) experiment at the NICA collider. Centrality characterizes the initial geometry of heavy-ion collisions through the correlation of measured observables with the impact parameter. Typically, charged-particle multiplicity serves as the observable of choice. However, this approach can introduce autocorrelation in net-proton multiplicity fluctuation studies. In this work, we propose a novel approach based on the combined use of signals from the forward hadron calorimeter (FHCal) and the electromagnetic calorimeter (ECal). This method is expected to suppress autocorrelation in the study of proton multiplicity fluctuations, while the combination of data from both detectors will enable unambiguous centrality event classification across the full centrality range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_25703 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Reconstruction of the Impact Parameter in Nucleus-Nucleus Collisions at the MPD Experiment Idrisov, D. Guber, F. Karpushkin, N. Parfenov, P. High Energy Physics - Experiment Event classification by centrality is one of the key tasks of the MPD (Multi-Purpose Detector) experiment at the NICA collider. Centrality characterizes the initial geometry of heavy-ion collisions through the correlation of measured observables with the impact parameter. Typically, charged-particle multiplicity serves as the observable of choice. However, this approach can introduce autocorrelation in net-proton multiplicity fluctuation studies. In this work, we propose a novel approach based on the combined use of signals from the forward hadron calorimeter (FHCal) and the electromagnetic calorimeter (ECal). This method is expected to suppress autocorrelation in the study of proton multiplicity fluctuations, while the combination of data from both detectors will enable unambiguous centrality event classification across the full centrality range. |
| title | Reconstruction of the Impact Parameter in Nucleus-Nucleus Collisions at the MPD Experiment |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2605.25703 |