2023/11/15 by Eung Jin Chun, Chun, Eung Jin, Tae Hyun Jung +1 · 2 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2311.09005
openalex publication_date 2023/11/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We propose a leptogenesis scenario where baryon asymmetry generation is assisted by the kinetic motion of the majoron, J, in the process of lepton-number violating inverse decays of a right-handed neutrino, N. We investigate two distinct scenarios depending on the sources of majoron kinetic motion: 1) the misalignment mechanism, and 2) the kinetic misalignment mechanism. The former case can naturally generate the observed baryon asymmetry for the majoron mass mJ \gtrsim \rm TeV and the right-handed neutrino's mass MN \gtrsim 1011 \rm GeV. However, an additional decay channel of the majoron is required to avoid the overclosure problem of the majoron oscillation. The later scenario works successfully for mJ \lesssim 100 \rm keV, and MN \lesssim 109 \rm GeV while MN can be even far below the temperature of the electroweak phase transition as long as sufficiently large kinetic misalignment is provided. We also find that a sub-100 \rm keV majoron is a viable candidate for dark matter.