English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The QCD axion bubbles can form due to an explicit breaking of thePeccei-Quinn symmetry in the early Universe. In this paper, we investigate themodified formation of QCD axion bubble in the presence of axionlike particle(ALP), considering its resonant conversion to QCD axion. We consider a generalscenario where the QCD axion mixes with ALP before the QCD phase transition. Inthis scenario, the energy density of the ALP can be adiabatic transferred tothe QCD axion at a temperature $T_R$, resulting in the suppression of thecosmic background temperature $T_B$ at which the energy density of the QCDaxion equals that of the radiation. The QCD axion bubbles form when the QCDaxions arise during the QCD phase transition. Finally, we briefly discuss theimpact of the formation of QCD axion bubbles on the formation of primordialblack holes.

QCD axion bubbles in the presence of ALP resonant conversion