Abstract
In this paper we study the Chiral Separation Effect by means of first-principles lattice QCD simulations. For the first time in the literature, we determine the continuum limit of the associated conductivity using 2+1 flavors of dynamical staggered quarks at physical masses. The results reveal a suppression of the conductivity in the confined phase and a gradual enhancement toward the perturbative value for high temperatures. In addition to our dynamical setup, we also investigate the impact of the quenched approximation on the conductivity, using both staggered and Wilson quarks. Finally, we highlight the relevance of employing conserved vector and anomalous axial currents in the lattice simulations.
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Acknowledgments
This research was funded by the DFG (Collaborative Research Center CRC-TR 211 “Strong-interaction matter under extreme conditions” - project number 315477589 - TRR 211) and by the Helmholtz Graduate School for Hadron and Ion Research (HGS-HIRe for FAIR). GE would like to express special thanks to the Mainz Institute for Theoretical Physics (MITP) of the Cluster of Excellence PRISMA+ (Project ID 39083149) for its hospitality and support. The authors are moreover grateful for inspiring discussions with Pavel Buividovich, Kenji Fukushima, Dirk Rischke, Sören Schlichting, Igor Shovkovy and Lorenz von Smekal.
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Brandt, B.B., Endrődi, G., Garnacho-Velasco, E. et al. The chiral separation effect from lattice QCD at the physical point. J. High Energ. Phys. 2024, 142 (2024). https://doi.org/10.1007/JHEP02(2024)142
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DOI: https://doi.org/10.1007/JHEP02(2024)142