![]() ![]() We discuss properties of these regions, as well as relevant constraints on the presence of anticlouds in our Galaxy. In the case of anticlouds, we show how the isotopic ratio of antihelium nuclei might suggest that BBN has happened in an inhomogeneous manner, resulting in antiregions with a antibaryon-to-photon ratio η ¯ ≃ 10 − 3 η. We then entertain the possibility that these events originate from antimatter-dominated regions in the form of anticlouds or antistars. We argue that dark matter annihilations face similar difficulties in explaining this event. Using up-to-date semianalytical tools, we show that spallation from primary hydrogen and helium nuclei onto the ISM predicts a He 3 ¯ flux typically one to two orders of magnitude below the sensitivity of AMS-02 after 5 years, and a He 4 ¯ flux roughly 5 orders of magnitude below the AMS-02 sensitivity. We discuss the origin of the antihelium-3 and -4 events possibly detected by AMS-02. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |