Spontaneous leptogenesis in Higgs inflation

• Main Authors: Sung Mook Lee, Kin-ya Oda, Seong Chan Park
• Format: Article
• Language: English
• Published: SpringerOpen 2021-03-01
• Series: Journal of High Energy Physics
• Subjects: Cosmology of Theories beyond the SM; Global Symmetries; Higgs Physics
• Online Access: https://doi.org/10.1007/JHEP03(2021)083

Abstract We propose a scenario of spontaneous leptogenesis in Higgs inflation with help from two additional operators: the Weinberg operator (Dim 5) and the derivative coupling of the Higgs field and the current of lepton number (Dim 6). The former is responsible for lepton number violation and the latter induces chemical potential for lepton number. The period of rapidly changing Higgs field, naturally realized in Higgs inflation during the reheating, allows large enhancement in the produced asymmetry in lepton number, which is eventually converted into baryon asymmetry of the universe. This scenario is compatible with high reheating temperature of Higgs inflation model.