Geometric bremsstrahlung in the early Universe

Toshifumi Futamase, Masahiro Hotta, Hajime Inoue, Masahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We discuss photon emission from particles decelerated by the cosmic expansion. This can be interpretated as a kind of bremsstrahlung induced by the Universe geometry. In the high momentum limit, its transition probability does not depend on detailed behavior of the expansion. This may play an important role when massless particle emission is discussed in the early Universe.

Original languageEnglish
Pages (from-to)113-123
Number of pages11
JournalProgress of Theoretical Physics
Issue number1
Publication statusPublished - 1996 Jul

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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