Dark QCD perspective inspired by strong CP problem at QCD scale
Abstract We discuss a QCD-scale composite axion model arising from dark QCD coupled to QCD. The presently proposed scenario not only solves the strong CP problem, but also is compatible with the preheating setup for the QCD baryogenesis. The composite axion is phenomenologically required to mimic th...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-01-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP01(2025)077 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823863480276484096 |
|---|---|
| author | Bin Wang Shinya Matsuzaki Hiroyuki Ishida |
| author_facet | Bin Wang Shinya Matsuzaki Hiroyuki Ishida |
| author_sort | Bin Wang |
| collection | DOAJ |
| description | Abstract We discuss a QCD-scale composite axion model arising from dark QCD coupled to QCD. The presently proposed scenario not only solves the strong CP problem, but also is compatible with the preheating setup for the QCD baryogenesis. The composite axion is phenomenologically required to mimic the QCD pion, but can generically be flavorful, which could be testable via the induced flavor changing processes at experiments. Another axionlike particle (ALP) is predicted to achieve the axion relaxation mechanism, which can phenomenologically act as the conventional QCD axion. This ALP can be ultralight, having the mass less than 1 eV, to be a dark matter candidate. The QCD × dark QCD symmetry structure constrains dark QCD meson spectra, so that the dark η′-like meson would only be accessible at the collider experiments. Still, the Belle II and Electron ion collider experiments can have a high enough sensitivity to probe the dark η′-like meson in the diphoton channel, which dominantly arises from the mixing with the QCD η′ and the pionic composite axion. We also briefly address nontrivial cosmological aspects, such as those related to the dark-chiral phase transition, the dark matter production, and an ultraviolet completion related to the ultralight ALP. |
| format | Article |
| id | doaj-art-b38589c392d541e6b0b8200e4592dfed |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-b38589c392d541e6b0b8200e4592dfed2025-02-09T12:07:17ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025112510.1007/JHEP01(2025)077Dark QCD perspective inspired by strong CP problem at QCD scaleBin Wang0Shinya Matsuzaki1Hiroyuki Ishida2Center for Theoretical Physics and College of Physics, Jilin UniversityCenter for Theoretical Physics and College of Physics, Jilin UniversityCenter for Liberal Arts and Sciences, Toyama Prefectural UniversityAbstract We discuss a QCD-scale composite axion model arising from dark QCD coupled to QCD. The presently proposed scenario not only solves the strong CP problem, but also is compatible with the preheating setup for the QCD baryogenesis. The composite axion is phenomenologically required to mimic the QCD pion, but can generically be flavorful, which could be testable via the induced flavor changing processes at experiments. Another axionlike particle (ALP) is predicted to achieve the axion relaxation mechanism, which can phenomenologically act as the conventional QCD axion. This ALP can be ultralight, having the mass less than 1 eV, to be a dark matter candidate. The QCD × dark QCD symmetry structure constrains dark QCD meson spectra, so that the dark η′-like meson would only be accessible at the collider experiments. Still, the Belle II and Electron ion collider experiments can have a high enough sensitivity to probe the dark η′-like meson in the diphoton channel, which dominantly arises from the mixing with the QCD η′ and the pionic composite axion. We also briefly address nontrivial cosmological aspects, such as those related to the dark-chiral phase transition, the dark matter production, and an ultraviolet completion related to the ultralight ALP.https://doi.org/10.1007/JHEP01(2025)077Axions and ALPsCompositenessNew Gauge Interactions |
| spellingShingle | Bin Wang Shinya Matsuzaki Hiroyuki Ishida Dark QCD perspective inspired by strong CP problem at QCD scale Journal of High Energy Physics Axions and ALPs Compositeness New Gauge Interactions |
| title | Dark QCD perspective inspired by strong CP problem at QCD scale |
| title_full | Dark QCD perspective inspired by strong CP problem at QCD scale |
| title_fullStr | Dark QCD perspective inspired by strong CP problem at QCD scale |
| title_full_unstemmed | Dark QCD perspective inspired by strong CP problem at QCD scale |
| title_short | Dark QCD perspective inspired by strong CP problem at QCD scale |
| title_sort | dark qcd perspective inspired by strong cp problem at qcd scale |
| topic | Axions and ALPs Compositeness New Gauge Interactions |
| url | https://doi.org/10.1007/JHEP01(2025)077 |
| work_keys_str_mv | AT binwang darkqcdperspectiveinspiredbystrongcpproblematqcdscale AT shinyamatsuzaki darkqcdperspectiveinspiredbystrongcpproblematqcdscale AT hiroyukiishida darkqcdperspectiveinspiredbystrongcpproblematqcdscale |