$\rho$-mass Modification in $H{e}^3$ - a Signal of Restoration of Chiral Symmetry or Test for Nuclear Matter Models ?

Abhijit Bhattacharyya, Sanjay K. Ghosh, Sibaji Raha

Two recent experiments have demonstrated that the effective $\rho$-mass in nuclear medium, as extracted from the ${}^{3}He(\gamma ,{\pi }^{+}{\pi }^{-})$ reaction, is substantially reduced. This has been a…