We propose a new factorization formula for forward dijet production in dilute-dense collisions which encompasses both the saturation regime and the dijet decorrelation regime. The first regime is inherited from the back-to-back correlation limit of the Color Glass Condensate framework, while the other is specific to the High Energy (or k T ) Factorization. The new formula is an extrapolation of the Transverse Momentum Dependent (TMD) factorization approach to the case when the off-shellness of

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... he incoming small-x gluon is not neglected. The off-shell gauge invariant hard factors corresponding to various TMD gluon distributions are calculated in two independent ways, in particular using color decomposition and helicty method.