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 EndrődiORCiDGND, José Javier Hernández HernándezORCiD, Gergely MarkóORCiD |
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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 |