Experimental state of n-n correlation function for Borromean halo nuclei investigation

The present experimental and theoretical state of Cnn correlation function for Borromean halo nuclei investigation is reviewed. Some of the consequences of a recently appeared new theory of Cnn, [M.T. Yamashita, T. Frederico, and L. Tomio, Phys. Rev. C 72 (2005) 011601] together with the experimental possibilities to test this theory will be presented in this contribution.