High Momentum Behavior of Geometric Bremsstrahlung in the Expanding Universe
M. Hotta, H. Inoue, I. Joichi, M. Tanaka
TL;DR
This paper investigates geometric bremsstrahlung processes in an expanding universe, revealing non-vanishing transition probabilities and a novel duality related to the universe's scale factor.
Contribution
It introduces the concept of duality in transition probabilities and analyzes bremsstrahlung processes in a flat Robertson-Walker universe.
Findings
Transition probabilities remain non-zero despite high temperature conditions.
A new duality relation with respect to the scale factor is identified.
Explicit probability forms exhibit this duality property.
Abstract
We shall discuss various kinds of geometric bremsstrahlung processes in the spatially flat Robertson-Walker universe. Despite that the temperature of the universe is much higher than particle masses and the Hubble parameter, the transition probability of these processes do not vanish. It is also pointed out that explicit forms of the probability possess a new duality with respect to scale factor of background geometry.
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