Relating U(N)xU(N) to SU(N)xSU(N) Chern-Simons Membrane theories
Abstract
By integrating out the U(1)B gauge field, we show that the U(n)xU(n) ABJM theory at level k is equivalent to a Zk identification of the (SU(n)xSU(n))/Zn Chern-Simons theory, but only when n and k are coprime. As a consequence, the k=1 ABJM model for two M2-branes in R8 can be identified with the N=8 (SU(2)xSU(2))/Z2 theory. We also conjecture that the U(2)xU(2) ABJM model at k=2 is equivalent to the N=8 SU(2)xSU(2)-theory.
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