Photoproduction of lepton pair in ultra-relativistic heavy-ion collisions
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916284520726528 |
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| author | Yu, Kewei Peng, Jiazhen Li, Shuang Wu, Kejun Xie, Wei Sun, Fei |
| author_facet | Yu, Kewei Peng, Jiazhen Li, Shuang Wu, Kejun Xie, Wei Sun, Fei |
| contents | Dilepton production provides a unique probe of the strong electromagnetic field produced in heavy-ion collisions. To map out the behavior of its transverse momentum broadening, we present a theoretical model based on the equivalent photon approximation, and then we update it to make direct comparisons with the recent experimental measurements. We find that the model calculations can describe well, not only the average transverse momentum squared of $e^{+}e^{-}$ pairs in Au--Au collisions at $\sqrt{s_{\rm NN}}=200$ GeV, but also the acoplanarity of $μ^{+}μ^{-}$ pairs in Pb--Pb collisions at$\sqrt{s_{\rm NN}}=5.02$ TeV. Furthermore, the model predictions are also able to reproduce the measured dependencies of the pair mass and the transverse momentum squared. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10645 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photoproduction of lepton pair in ultra-relativistic heavy-ion collisions Yu, Kewei Peng, Jiazhen Li, Shuang Wu, Kejun Xie, Wei Sun, Fei Nuclear Theory High Energy Physics - Phenomenology Dilepton production provides a unique probe of the strong electromagnetic field produced in heavy-ion collisions. To map out the behavior of its transverse momentum broadening, we present a theoretical model based on the equivalent photon approximation, and then we update it to make direct comparisons with the recent experimental measurements. We find that the model calculations can describe well, not only the average transverse momentum squared of $e^{+}e^{-}$ pairs in Au--Au collisions at $\sqrt{s_{\rm NN}}=200$ GeV, but also the acoplanarity of $μ^{+}μ^{-}$ pairs in Pb--Pb collisions at$\sqrt{s_{\rm NN}}=5.02$ TeV. Furthermore, the model predictions are also able to reproduce the measured dependencies of the pair mass and the transverse momentum squared. |
| title | Photoproduction of lepton pair in ultra-relativistic heavy-ion collisions |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.10645 |