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The minimal cosmological standard model.

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Title:	The minimal cosmological standard model.
Authors:	Barenboim, Gabriela^1,2 (AUTHOR) gabriela.barenboim@uv.es, Ko, Pyungwon³ (AUTHOR) pko@kias.re.kr, Park, Wan-Il^1,2,4 (AUTHOR) wipark@jbnu.ac.kr
Source:	Nuclear Physics B. Sep2025, Vol. 1018, pN.PAG-N.PAG. 1p.
Subjects:	Physical cosmology, Dark matter, Inflationary universe, Antimatter, Mathematical symmetry, Neutrino mass, CP violation
Abstract:	We propose a novel minimal scenario which simultaneously addresses the following theoretical/cosmological/phenomenological puzzles: (i) the origin of scales, (ii) primordial inflation, (iii) matter-antimatter asymmetry, (iv) tiny neutrino masses, (v) dark matter, and (vi) the strong CP-problem. Exact scale-symmetry was assumed. A global U (1) PQ -symmetry was also assumed but only in the matter sector. The novelty of the scenario is the introduction of explicit U (1) PQ -breaking terms with field-dependent coefficients in the gravity sector. Such a term does not disturb the axion solution whereas naturally realizes an axi-majoron hybrid inflation which allows a natural realization of Affleck-Dine mechanism for generating Peccei-Quinn number asymmetry. The asymmetry can be transferred to the visible sector via the right-handed neutrino portal through non-thermal decay and thermal processes, even without the presence of a CP-violating phase in the matter sector. Dark matter and dark radiation are obtained by cold and hot components of axi-majorons, respectively. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	We propose a novel minimal scenario which simultaneously addresses the following theoretical/cosmological/phenomenological puzzles: (i) the origin of scales, (ii) primordial inflation, (iii) matter-antimatter asymmetry, (iv) tiny neutrino masses, (v) dark matter, and (vi) the strong CP-problem. Exact scale-symmetry was assumed. A global U (1) PQ -symmetry was also assumed but only in the matter sector. The novelty of the scenario is the introduction of explicit U (1) PQ -breaking terms with field-dependent coefficients in the gravity sector. Such a term does not disturb the axion solution whereas naturally realizes an axi-majoron hybrid inflation which allows a natural realization of Affleck-Dine mechanism for generating Peccei-Quinn number asymmetry. The asymmetry can be transferred to the visible sector via the right-handed neutrino portal through non-thermal decay and thermal processes, even without the presence of a CP-violating phase in the matter sector. Dark matter and dark radiation are obtained by cold and hot components of axi-majorons, respectively. [ABSTRACT FROM AUTHOR]
ISSN:	05503213
DOI:	10.1016/j.nuclphysb.2025.116983