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We consider thermal corrections to dark matter (DM) annihilation processes, where real photon emission and absorption processes \(\chi \bar{\chi } \rightarrow f \bar{f} \gamma \) contribute along with virtual corrections to the \(\chi \bar{\chi } \rightarrow f \bar{f} \) annihilation cross section at next-to-leading order (NLO). We calculate the corrections at \(\mathcal{{O}}(\alpha )\) to the annihilation cross section of DM through real photon emission and absorption processes utilizing techniques of thermal field theory, applying the generalized Grammer and Yennie technique in order to deal with infrared divergences encountered in annihilation cross section calculations.

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Thermal Correction to Dark Matter Annihilation Processes Through Real Photon Emission and Absorption

  • 会议论文

  • 发表日期：

    2025年

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  • Prabhat Butola,
  • D. Indumathi,
  • Pritam Sen

摘要

We consider thermal corrections to dark matter (DM) annihilation processes, where real photon emission and absorption processes \(\chi \bar{\chi } \rightarrow f \bar{f} \gamma \) contribute along with virtual corrections to the \(\chi \bar{\chi } \rightarrow f \bar{f} \) annihilation cross section at next-to-leading order (NLO). We calculate the corrections at \(\mathcal{{O}}(\alpha )\) to the annihilation cross section of DM through real photon emission and absorption processes utilizing techniques of thermal field theory, applying the generalized Grammer and Yennie technique in order to deal with infrared divergences encountered in annihilation cross section calculations.