About
The Standard Model gauge group has an ambiguity in its global form, which is closely related to a Z_6 one-form global symmetry. In this talk, we will discuss how this ambiguity affects the simplest model of QCD axions - a single axion coupled to the Standard Model. Assuming the absence of axion domain wall problem, we derive a lower bound on the axion-photon coupling. We will then discuss the fate of this Z_6 one-form global symmetry in the axion Standard Model. Depending on the details, the symmetry can be part of a higher-group or a non-invertible symmetry. Using this symmetry, we argue for a lower bound on the hypercharge magnetic monopole mass and the axion string tension. .
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The talk
Credits and licence
- Institution
- CERN
- Department
- TH String Theory Seminar
- Speaker
- Ho Tat Lam
- Year
- 2024
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed