Background Field Effects on Quasi-Real Photon Emission and Lepton-Pair Production at EIC and EicC
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908663192485888 |
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| author | Li, Cong |
| author_facet | Li, Cong |
| contents | We study how background electromagnetic fields modify quasi-real photon emission at the EIC and EicC through an effective coupling correction, thereby altering the photon flux spectrum. The resulting change in lepton-pair production via photon-photon fusion, where one photon arises from the electron and the other from the nuclear Coulomb field-serves as a clean QED probe of such background effects. In our formulation, the correction originates from a non-perturbative modification of the photon propagator induced by the background field. Because this process shares the same initial-state photon dynamics as photon-gluon fusion, any background-induced alteration of the photon propagator directly impacts the extraction of small-$x$ gluon distributions. Numerical estimates at realistic collider energies indicate that these corrections should be non-negligible in certain kinematic regions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_14800 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Background Field Effects on Quasi-Real Photon Emission and Lepton-Pair Production at EIC and EicC Li, Cong High Energy Physics - Phenomenology We study how background electromagnetic fields modify quasi-real photon emission at the EIC and EicC through an effective coupling correction, thereby altering the photon flux spectrum. The resulting change in lepton-pair production via photon-photon fusion, where one photon arises from the electron and the other from the nuclear Coulomb field-serves as a clean QED probe of such background effects. In our formulation, the correction originates from a non-perturbative modification of the photon propagator induced by the background field. Because this process shares the same initial-state photon dynamics as photon-gluon fusion, any background-induced alteration of the photon propagator directly impacts the extraction of small-$x$ gluon distributions. Numerical estimates at realistic collider energies indicate that these corrections should be non-negligible in certain kinematic regions. |
| title | Background Field Effects on Quasi-Real Photon Emission and Lepton-Pair Production at EIC and EicC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.14800 |