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We give explicit analytical expressions for the partition function of$U(N)_{k}\times U(N+M)_{-k}$ ABJ theory at weak coupling ($k\rightarrow \infty)$ for finite and arbitrary values of $N$ and $M$ (including the ABJM case andits mass-deformed generalization). We obtain the expressions by identifying theone-matrix model formulation with a Meixner-Pollaczek ensemble and using thecorresponding orthogonal polynomials, which are also eigenfunctions of a$su(1,1)$ quantum oscillator. Wilson loops in mass-deformed ABJM are alsostudied in the same limit and interpreted in terms of $su(1,1)$ coherentstates.

Mass-deformed ABJ and ABJM theory, Meixner-Pollaczek polynomials, and $su(1,1)$ oscillators