2021/02/28 by Toru Kojo, Daiki Suenaga
Physics and Astronomy · #Color superconductivity #Condensed matter physics #Diquark #Gluon #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Quark–gluon plasma #Strange matter #astro-ph.HE #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.103.094008
published as Phys. Rev. D 103, 094008 (2021) · 10 pages, 10 figures; v2 published in PRD
arxiv created 2021/05/04 · openalex publication_date 2021/05/12 · arxiv updated 2021/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study Landau gauge gluon propagators in two-color QCD at a finite quark chemical potential (\ensuremathμq) and temperature (T). We include medium polarization effects at the one loop by quarks into massive gluon propagators and compare the analytic results with the available lattice data. We particularly focus on the high density phase of color-singlet diquark condensates whose critical temperature is \ensuremath∼100 MeV with a weak dependence on \ensuremathμq. At zero temperature, the color singlet condensates protect the IR limit of electric and magnetic gluon propagators from the medium screening effects. At a finite temperature, this behavior remains true for the magnetic sector, but the electric screening mass should be generated by thermal, and hence gapless, particles which are unbound from the diquark condensates. Treating thermal excitations as quasiquarks, we found that the electric screening develops too fast as compared to the lattice results. Beyond the critical temperature for diquark condensates, the analytic results are consistent with the lattice results.