2013/10/01 by M. Laine, Laine, M. · 3 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph
paper · pdf · doi:10.48550/arxiv.1310.0164
21 pages
arxiv created 2013/10/01 · openalex publication_date 2013/10/01 · arxiv updated 2013/10/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The vector channel spectral function and the dilepton production rate from a QCD plasma at a temperature above a few hundred MeV are evaluated up to next-to-leading order (NLO) including their dependence on a non-zero momentum with respect to the heat bath. The invariant mass of the virtual photon is taken to be in the range K2 ~ (pi T)2 ~ (1 GeV)2, generalizing previous NLO results valid for K2 >> (pi T)2. In the opposite regime 0 < K2 << (pi T)2 the loop expansion breaks down, but agrees nevertheless in order of magnitude with a previous result obtained through resummations. Ways to test the vector spectral function through comparisons with imaginary-time correlators measured on the lattice are discussed.