Perturbative corrections to soft photon theorems for massless scalar QED in de Sitter spacetime.
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| Title: | Perturbative corrections to soft photon theorems for massless scalar QED in de Sitter spacetime. |
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| Authors: | Chattopadhyay, Pratik1 (AUTHOR) pratikpc@gmail.com |
| Source: | European Physical Journal C -- Particles & Fields. Feb2026, Vol. 86 Issue 2, p1-10. 10p. |
| Subjects: | Spacetime, Quantum electrodynamics, Perturbation theory, Scattering (Mathematics), Hypothesis |
| Abstract: | The perturbative corrections to soft photon theorems with massive scalars in de Sitter spacetime were computed in (Bhatkar and Jain in J High Energy Phys 2023:55, 2023). However, the massless limit of the scalar modes is ill-defined in their work. It therefore is ambiguous to take the massless limit of the soft factors. In this paper, we derive the massless scalar modes in d-dimensional de Sitter spacetime and use it to compute the perturbative corrections to the leading and sub-leading soft photon theorems. Our framework corresponds to tree level scattering of massless scalars followed by an emission of a soft photon in a compact region of the static patch of de Sitter. We show that our results are consistent with (Bhatkar and Jain in J High Energy Phys 2023:55, 2023) in the massless limit and we comment on the universality of our results. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The perturbative corrections to soft photon theorems with massive scalars in de Sitter spacetime were computed in (Bhatkar and Jain in J High Energy Phys 2023:55, 2023). However, the massless limit of the scalar modes is ill-defined in their work. It therefore is ambiguous to take the massless limit of the soft factors. In this paper, we derive the massless scalar modes in d-dimensional de Sitter spacetime and use it to compute the perturbative corrections to the leading and sub-leading soft photon theorems. Our framework corresponds to tree level scattering of massless scalars followed by an emission of a soft photon in a compact region of the static patch of de Sitter. We show that our results are consistent with (Bhatkar and Jain in J High Energy Phys 2023:55, 2023) in the massless limit and we comment on the universality of our results. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-026-15393-w |
