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Title: Adiabatic electroweak baryogenesis driven by an axionlike particle

Journal Article · · Physical Review. D.
 [1];  [2]; ORCiD logo [3]
  1. Pusan National Univ., Busan (Korea)
  2. Institute for Basic Science (IBS), Daejeon (Korea); Florida State Univ., Tallahassee, FL (United States)
  3. Institute for Basic Science (IBS), Daejeon (Korea)

An axionlike particle (ALP) offers a new direction in electroweak baryogenesis because the periodic nature enables it to trigger a strong first-order phase transition insensitively to the decay constant $$\mathcal{f}$$. For $$\mathcal{f}$$ much above TeV, the ALP-induced electroweak phase transition is approximately described by adiabatic processes, distinguishing our scenario for electroweak baryogenesis from the conventional ones. We show that, coupled to the electroweak anomaly, the ALP can naturally realize spontaneous electroweak baryogenesis to solve the matter-antimatter asymmetry problem for $$\mathcal{f}$$ in the range between about 105 and 107 GeV. In such an ALP window, the $$\textit{CP}$$ violation for baryogenesis is totally free from the experimental constraints, especially from the recently improved limit on the electron electric dipole moment. Future searches for ALPs could probe our scenario while revealing the connection between electroweak symmetry breaking and baryogenesis.

Research Organization:
Florida State Univ., Tallahassee, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Research Foundation of Korea (NRF)
Grant/Contract Number:
SC0010102; NRF-2018R1C1B6006061
OSTI ID:
1598397
Alternate ID(s):
OSTI ID: 1802038
Journal Information:
Physical Review. D., Vol. 101, Issue 3; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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