Superheavy WIMP dark matter from incomplete thermalization

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 $m_{DM}\gtrsim 10^9$ GeV. In the future, the superheavy WIMP DMs can be searched up to $m_{DM}\simeq 10^{12}$ GeV, which corresponds to the so-called neutrino floor limit. We show that the observed abundance of ${\Omega }_{\mathrm{DM}}{h}^2\simeq 0.1$ for a superheavy WIMP DM can be reproduced by a suitable reheating temperature of $T_R\simeq m_{DM}/29$ after inflation, if the direct inflaton decay into DM is negligible or kinematically forbidden.

arXiv comment11 pages, 2 figures, references added, version published in Phys. Lett. B

References in corpus (10)

• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• Cold and Fuzzy Dark Matter
• Minimal Dark Matter
• Neutralino Relic Density including Coannihilations
• Implication of neutrino backgrounds on the reach of next generation dark matter direct detection experiments
• Super heavy thermal dark matter
• Heavy Thermal Relics from Zombie Collisions
• SO(10) paths to dark matter
• Dark matter as a heavy thermal hot relic
• Searching for Axino-Like Particle at Fixed Target Experiments

Cited by in corpus (8)

• WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and $\Delta N_{eff}$
• New constraints on ultraheavy dark matter from the LZ experiment
• Invisible Higgs decay from dark matter freeze-in at stronger coupling
• Axions, WIMPs, proton decay and observable $r$ in $SO(10)$
• Thermal and nonthermal dark matters with gravitational neutrino reheating
• SO(10) Grand Unification with Minimal Dark Matter and Color Octet Scalars
• Unraveling particle dark matter with Physics-Informed Neural Networks
• Freeze-in and freeze-out production of Higgs portal Majorana fermionic dark matter during and after reheating