2008

Pion electromagnetic charge radii and rho-meson mass shift at finite density

Nam, Seung-il, Kim, Hyun-Chul

Understand

We investigate the pion electromagnetic charge radii and mass dropping of the rho meson at finite density.

We first calculate the pion charge radii within the framework of the nonlocal chiral quark model from the instanton vacuum both at zero and finite densities.
In order to relate the change of the pion charge radius to that of the rho-meson mass at finite density, we employ the vector-meson dominance for the pion electromagnetic form factor.
It turns out that the pion charge radius is getting larger as the quark chemical potential increases.

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