Rho Mesons in Asymmetric Nuclear Matter: A Renormalization Group   Approach
  The running of the $\rho\bar N N$ couplings in presence of nuclear matter is studied, and the relevant $\beta$-functions are shown to be different for $\rho^0$ and $\rho^+$, when the nuclear medium is asymmetric. 
Abhee K. Dutt-Mazumder, Triptesh De, Binayak Dutta-Roy and Anirban   Kundu