The impact of glasma on heavy quark spectra and correlations
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909561204506624 |
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| author | Avramescu, Dana Greco, Vincenzo Lappi, Tuomas Mäntysaari, Heikki Müller, David. I. |
| author_facet | Avramescu, Dana Greco, Vincenzo Lappi, Tuomas Mäntysaari, Heikki Müller, David. I. |
| contents | We investigate the effect of the glasma classical color fields, produced in the very early stage of heavy-ion collisions, on the transport of heavy quarks. The glasma fields evolve according to the classical Yang-Mills equations, while the dynamics of heavy quarks is described by Wong's equations. We numerically solve these equations and compute the transport coefficient $κ$, which is anisotropic and initially very large. Further, we extract observables sensitive to the initial glasma stage. The heavy quark nuclear modification factor $R_{AA}$ is affected by the glasma but the effect is moderate compared to the nPDF contribution. Our main finding is that the glasma has a large impact on the azimuthal correlation between $Q\overline{Q}$ pairs, initially produced back-to-back. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01147 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The impact of glasma on heavy quark spectra and correlations Avramescu, Dana Greco, Vincenzo Lappi, Tuomas Mäntysaari, Heikki Müller, David. I. High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Theory We investigate the effect of the glasma classical color fields, produced in the very early stage of heavy-ion collisions, on the transport of heavy quarks. The glasma fields evolve according to the classical Yang-Mills equations, while the dynamics of heavy quarks is described by Wong's equations. We numerically solve these equations and compute the transport coefficient $κ$, which is anisotropic and initially very large. Further, we extract observables sensitive to the initial glasma stage. The heavy quark nuclear modification factor $R_{AA}$ is affected by the glasma but the effect is moderate compared to the nPDF contribution. Our main finding is that the glasma has a large impact on the azimuthal correlation between $Q\overline{Q}$ pairs, initially produced back-to-back. |
| title | The impact of glasma on heavy quark spectra and correlations |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Theory |
| url | https://arxiv.org/abs/2504.01147 |