https://doi.org/10.1051/epjconf/202429607010
Electromagnetic probes for critical fluctuations of phase transitions in dense QCD
1 Department of Physics, Osaka University, 560-0043, Toyonaka, Osaka, Japan
2 Yukawa Institute for Theoretical Physics, Kyoto University, 606-8502, Kyoto, Japan
3 J-PARC Branch, KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, 319-1106, Tokai, Ibaraki, Japan
* e-mail: nishimura@kern.phys.sci.osaka-u.ac.jp
Published online: 26 June 2024
We study how the dilepton production rates and electric conductivity are affected by the phase transition to color superconductivity and the QCD critical point. Effects of the soft modes associated with these phase transitions are incorporated through the photon self-energy called the Aslamazov- Larkin, Maki-Thompson, and density-of-states terms, which are responsible for the paraconductivity in metallic superconductors. We show that anomalous enhancements of the production rate in the low energy/momentum region and the conductivity occur around the respective critical points.
© The Authors, published by EDP Sciences, 2024
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