What if ALP dark matter for the XENON1T excess is the inflaton

Abstract

The recent XENON1T excess in the electron recoil data can be explained by anomaly-free axion-like particle (ALP) dark matter with mass $m_{\varphi }=2.3\pm 0.2$keV and the decay constant $f_{\varphi }/q_e\simeq 2\times 10^{10}\sqrt{{\Omega }_{\varphi }/{\Omega }_{\mathrm{DM}}}\mathrm{GeV}$. Intriguingly, the suggested mass and decay constant are consistent with the relation, $f_{\varphi }\sim 10^3\sqrt{m_{\varphi }{M}_p}$, predicted in a scenario where the ALP plays the role of the inflaton. This raises a possibility that the ALP dark matter responsible for the XENON1T excess also drove inflation in the very early universe. We study implications of the XENON1T excess for the ALP inflation and thermal history of the universe after inflation.

21pages, 4figures

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Cited by in corpus (17)

• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Kilobyte Cosmic Birefringence from ALP Domain Walls
• Light Dark Matter from Inflaton Decay
• Challenges for heavy QCD axion inflation
• Constraining axion-like particles using the white dwarf initial-final mass relation
• Cosmic Axion Force
• Indirect Detection of eV Dark Matter via Infrared Spectroscopy
• Thermal production of cold "hot dark matter" around eV
• Phenomenology of CP-even ALP
• Xenon-1T excess as a possible signal of a sub-GeV hidden sector dark matter
• Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
• Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
• Suppression of Higgs Mixing by Quantum Zeno Effect
• Type-II Majoron Dark Matter
• Anomaly-free ALP from non-Abelian flavor symmetry
• Dark Fluxes from Accreting Black Holes and Direct Detections
• Hidden Photon and Axion Dark Matter from Symmetry Breaking