Parity solution to the strong CP problem and a unified framework for inflation, baryogenesis, and dark matter

Babu, K. S.; Mohapatra, Rabindra N.; Okada, Nobuchika

doi:10.1007/jhep01(2024)136

Parity solution to the strong CP problem and a unified framework for inflation, baryogenesis, and dark matter

Journal Article · Wed Jan 24 00:00:00 EST 2024 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep01(2024)136· OSTI ID:2575970

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Oklahoma State Univ., Stillwater, OK (United States)
Univ. of Maryland, College Park, MD (United States)
Univ. of Alabama, Tuscaloosa, AL (United States)

It has been known for some time that asymptotic parity invariance of weak interactions can provide a solution to the strong CP problem without the need for the axion. Left-right symmetric theories which employ a minimal Higgs sector consisting of a left-handed and a right-handed doublet is an example of such a theory wherein all fermion masses arise through a generalized seesaw mechanism. In this paper we present a way to understand the origin of matter-antimatter asymmetry as well as the dark matter content of the universe in these theories using the Affleck-Dine (AD) leptogenesis mechanism and inflaton decay, respectively. Three gauge singlet fermions are needed for this purpose, two of which help to implement the Dirac seesaw for neutrino masses while the third one becomes the non-thermal dark matter candidate. A soft lepton number breaking term involving the AD scalar field is used to generate lepton asymmetry which suffers no wash-out effects and maintains the Dirac nature of neutrinos. This framework thus provides a unified description of many of the unresolved puzzles of the standard model that require new physics.

View Accepted Manuscript (DOE)

Research Organization:: Oklahoma State Univ., Stillwater, OK (United States); Univ. of Alabama, Tuscaloosa, AL (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0012447; SC0016013

OSTI ID:: 2575970

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 1 Vol. 2024; ISSN 1029-8479

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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Parity solution to the strong CP problem and a unified framework for inflation, baryogenesis, and dark matter

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