The Nelson-Barr CP-breaking scalar can serve as the inflaton in a hilltop potential, with post-inflationary energy too low to cross the CP-invariant ridge, thereby eliminating the domain-wall problem while providing reheating and, in a high-scale variant, leptogenesis.
Inflation caused by a potential valley with CP violation
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We propose an inflation scenario caused by an inflaton identified with a potential valley which brings about $CP$ violation in the standard model (SM). If singlet scalars have nonminimal couplings with the Ricci scalar in a suitable way, favorable inflation could be derived through the potential valley composed of such scalars. We study dynamics of the scalars during and after the inflation, which suggests that it could be described as a single field inflation approximately. If these scalars make suitable ingredients of the SM couple with vectorlike fermions and right-handed neutrinos, a CKM phase could be induced and also leptogenesis could occur successfully even at a rather low reheating temperature.
citation-role summary
background 1
citation-polarity summary
fields
hep-ph 1years
2026 1verdicts
CONDITIONAL 1roles
background 1polarities
unclear 1representative citing papers
citing papers explorer
-
Nelson-Barr Inflation
The Nelson-Barr CP-breaking scalar can serve as the inflaton in a hilltop potential, with post-inflationary energy too low to cross the CP-invariant ridge, thereby eliminating the domain-wall problem while providing reheating and, in a high-scale variant, leptogenesis.