UNI-MB - logo
UMNIK - logo
 
E-viri
Celotno besedilo
Odprti dostop
  • Bajc, Borut; Prelovšek, Saša; Rosina, Mitja

    06/1996
    Journal Article

    Z.Phys. A356 (1996) 187-191 The $\gamma\gamma\to\rho^0\rho^0\to 4 \pi$ reaction shows a broad peak at 1.5 GeV in the $(J^P,J_z)=(2^+,2)$ channel which has no counterpart in the $\rho^+\rho^-$ channel. This "resonance" is considered as a candidate for a $qq\bar q\bar q$ state in the "s-channel". We show, however, that it can also be explained by potential scattering of $\rho^0\rho^0$ via the $\sigma$- exchange in the "t-channel".