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Superheavy WIMP dark matter from incomplete thermalization

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Title: Superheavy WIMP dark matter from incomplete thermalization
Authors: Okada, Nobuchika Browse this author
Seto, Osamu Browse this author →KAKEN DB
Issue Date: 10-Sep-2021
Publisher: Elsevier
Journal Title: Physics Letters B
Volume: 820
Start Page: 136528
Publisher DOI: 10.1016/j.physletb.2021.136528
Abstract: Although it is usually thought that a class of weakly interacting massive particle (WIMP) dark matters (DMs), which have the vector coupling with the Z boson, is denied by null results of the direct DM searches, such WIMP DMs are still viable if they are superheavy with the mass of m(DM) greater than or similar to 10(9) GeV. In the future, the superheavy WIMP DMs can be searched up to m(DM) similar or equal to 10(12) GeV, which corresponds to the so-called neutrino floor limit. We show that the observed abundance of Omega(DM)h(2) similar or equal to 0.1 for a superheavy WIMP DM can be reproduced by a suitable reheating temperature of T-R similar or equal to m(DM)/29 after inflation, if the direct inflaton decay into DM is negligible or kinematically forbidden. (C) 2021 The Author(s). Published by Elsevier B.V.
Type: article
Appears in Collections:高等教育推進機構 (Institute for the Advancement of Higher Education) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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