Determination of the Cosmic Antideuteron Flux in a Monte Carlo approach

TL;DR

This paper models the cosmic antideuteron flux using Monte Carlo simulations and diffusion models, providing refined flux estimates that are about half of previous predictions, aiding in cosmic ray research.

Contribution

It introduces a Monte Carlo approach with DPMJET-III and a diffusion model to more accurately estimate the cosmic antideuteron flux.

Findings

Secondary antideuteron flux is about half of previous estimates.

Monte Carlo simulation improves modeling accuracy.

Refined flux predictions assist cosmic ray detection efforts.

Abstract

We investigate in this paper the antideuteron flux produced in high energy collisions of cosmic rays with the interstellar matter. We employ the Monte Carlo generator DPMJET-III together with the coalescence model to simulate, in an event-by-event basis, the antideuteron production in cosmic ray collisions in our Galaxy. Then, we use a diffusion model to calculate the expected flux. We find a secondary antideuteron flux at the Earth which is approximately a factor of two smaller than in previous calculations.