1997/05/28 by Su Houng Lee · 52 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Meson #Momentum (technical analysis) #Nuclear matter #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scaling #Spectral line #Vector meson #nucl-th
paper · pdf · doi:10.1103/physrevc.57.927
published in Physical Review C 57(2), 927-930 (American Institute of Physics) · 5 pages (Revtex) one figure
arxiv created 1997/05/28 · openalex publication_date 1998/02/01 · arxiv updated 2014/11/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We formulate a QCD sum rule to find the three-momentum (q) dependence of the peak position of the vector meson spectral density in the nuclear medium. For both the longitudinal and transverse polarization direction of the vector meson with respect to q, we find less than a 2% (0.1%) shift of the peak position in nuclear matter density and at q=0.5GeV/c for the \ensuremathρ,\ensuremathω (\ensuremathφ) mesons. This justifies neglecting the three-momentum dependence and the polarization effect when implementing the universal scaling laws of the vector mesons in understanding the dilepton spectrum in the A\ensuremath-A and p\ensuremath-A reactions.