QCD topology with electromagnetic fields and the axion-photon coupling
- The introduction of non-orthogonal electric and magnetic fields in the QCD vacuum enhances the weight of topological sectors with a nonzero topological charge. For weak fields, there is a linear response for the expectation value of the topological charge. We study this linear response and relate it to the QCD correction to the axion-photon coupling. We also analyse the magnetic field dependence of the topological susceptibility for a range of temperatures around Tc. In this work we use lattice simulations with improved staggered quarks at physical masses, including background magnetic and (imaginary) electric fields.
| Author: | Bastian Benjamin BrandtORCiDGND, Francesca CuteriORCiD, Gergely EndrődiORCiD, José Javier Hernández HernándezORCiD, Gergely MarkóORCiD |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-716765 |
| DOI: | https://doi.org/10.48550/arXiv.2212.03385 |
| ArXiv Id: | http://arxiv.org/abs/2212.03385 |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/02/11 |
| Date of first Publication: | 2022/12/11 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Contributing Corporation: | International Symposium on Lattice Field Theory (39. : 2022 : Bonn) |
| Release Date: | 2023/01/26 |
| Page Number: | 10 |
| HeBIS-PPN: | 508988705 |
| Institutes: | Physik / Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY-NC-SA - Namensnennung - Nicht kommerziell - Weitergabe unter gleichen Bedingungen 4.0 International |
