TL;DR
This paper explores the parton distributions within a photon gas, relevant for high-energy cosmic ray interactions with the cosmic microwave background, and calculates the survival probability of ultra-high energy neutrinos.
Contribution
It introduces an approach to determine parton distributions in a photon gas and applies it to calculate neutrino survival probabilities in cosmic microwave background radiation.
Findings
Parton distributions in a photon gas can be modeled using the proposed approach.
Survival probability of ultra-high energy neutrinos in the photon gas is quantified.
The results have implications for cosmic ray and neutrino astrophysics.
Abstract
In some cases it may be useful to know parton distributions in a photon gas. This may be relevant, e.g., for the analysis of interactions of high energy cosmic ray particles with the cosmic microwave background radiation. The latter can be considered as a gas of photons with an almost perfect blackbody spectrum. An approach to finding such parton distributions is described. The survival probability of ultra-high energy neutrinos traveling through this radiation is calculated.
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