Degenerate fermionic matter at N3LO

by Mr Seppänen Kaapo (University of Helsinki)

Friday 29 Apr 2022, 13:00 → 15:00 Europe/Helsinki

JYFL FYS2, Zoom: https://jyufi.zoom.us/j/61789738925

Understanding the thermodynamic properties of cold and dense strongly interacting matter has recently become a hot topic in nuclear and particle physics, mainly due to advancements in neutron star observations. At high densities, the only reliable first-principles method to obtain predictions for such matter is perturbative quantum chromodynamics (pQCD). Pressure, the key quantity in bulk thermodynamics, has been determined in cold and dense pQCD partially up to order g⁶ in the strong coupling constant.

 

In this presentation, I discuss the recent advances in this topic and present a new state-of-the-art result for the pressure of cold and dense QED matter to almost complete order e⁶ [1,2]. These calculations provide the first improvement to a 45-year-old milestone result and demonstrate the feasibility of generalizing them to QCD.

 

[1] T. Gorda, A. Kurkela, J. Österman, R. Paatelainen, S. Säppi, P. Schicho, Kaapo Seppänen, A. Vuorinen, "Degenerate fermionic matter at N3LO: Quantum Electrodynamics" (submitted to ArXiv)

[2] T. Gorda, A. Kurkela, J. Österman, R. Paatelainen, S. Säppi, P. Schicho, Kaapo Seppänen, A. Vuorinen, "Soft photon propagation in a hot and dense medium to next-to-leading order" (submitted to ArXiv)

seppanen_QEDpresentation.pdf