  We propose a new kind of two-particle correlation of identified hadrons in
longitudinal rapidity space, called $G_{\alpha\beta}(y_{\alpha},y_{\beta})$,
which can reflect clearly the charge correlations of hot quark system produced
in AA collisions at LHC energies. It is derived from the basic scenario of
quark combination mechanism of hadron production. Like the elliptic flow of
identified hadrons at intermediate transverse momentum, this correlation is
independent of the absolute hadronic yields but dependent only on the flavor
compositions of hadrons, and thus exhibits interesting properties for different
kinds of hadron species. We suggest the measurement of this observable in AA
collisions at LHC to gain more insights into the charge correlation properties
of produced hot quark matter.
