1997/01/31 by Hatsuda, Tetsuo
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.nucl-th/9702002
Physical reason behind the mass-shift of vector mesons (ρ, ω, ϕ) in nuclear matter is discussed in the Walecka model and in QCD sum rules. Using analytic formulas for the mass-shift valid at low densities, it is shown that the energy dependent part of the sels-energy (wave function renomalization) in medium is a main source for the negative mass-shift, while the energy independent part (the plasma frequency) has relatively a small effect. Future experiments in GSI (π- + A → X + ω ) and KEK-PS (p + A → X + ϕ ) to detect the twin peak structure of vector mesons in e+e- spectrum are reviewed. Also, it is proposed a new possible experiment using a S (strangeness) = 1 vector meson K*(892) with its radiative decay K*+(892) → K+ + γ.