REVIEW 4 cited by
Light QCD Axion Dark Matter from Double Level Crossings
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
The even light QCD axion called the $Z_{\mathcal N}$ axion can both solve the strong CP problem and account for the dark matter (DM). We point out that the single and double level crossings can naturally take place in the mass mixing between the $Z_{\mathcal N}$ axion and axionlike particle (ALP). The first level crossing occurs much earlier than the QCD phase transition, while the second level crossing occurs exactly during the QCD phase transition if it exists. We also find that the single level crossing can transform into the double level crossings, depending on the ALP mass $m_A$ versus the zero-temperature $Z_{\mathcal N}$ axion mass $m_{a,0}$. Compared with the no level crossing case, the $Z_{\mathcal N}$ axion relic density can be suppressed in the single level crossing, and enhanced or suppressed in the double level crossings.
Forward citations
Cited by 4 Pith papers
-
Sign-Flipping Axion Potentials via Kapitza-Type Modulation by Heavy Axions
Coherent oscillations of a heavy axion change the sign of a light axion's effective potential, trapping it in a false vacuum and boosting its dark matter abundance.
-
Hierarchical Axiverse
The paper asserts that the requirement of well-defined QCD-induced mixing alone forces ALP masses into a hierarchical spacing and decay constants into two separated populations, but it does not demonstrate the underly...
-
Stochastic Axion Mixing: A General Mechanism Beyond Decay Constant Constraints
Stochastic axion mixing is a broad mechanism for axion interactions in multi-axion systems that occurs naturally under distinct mass conditions and does not depend on decay constant hierarchies.
-
Completing Axion Double Level Crossings
Double level crossings are common in multi-axion mass mixing of Z_N axions and ALPs, occurring multiple times for large N in the light axion case but prevented by excessively large or small N in light and heavy scenar...
Discussion (0). Sign in to comment.