Noncommutative Perturbative Dynamics

Details Noncommutative Perturbative Dynamics Noncommutative Perturbative Dynamics

1999-12-08

arxiv.org/abs/hep-th/9912072v2

JHEP 0002:020,2000

Physics

High Energy Physics

High Energy Physics - Theory

33 pages, 17 figures, harvmac; v2 minor changes

Scientific paper

10.1088/1126-6708/2000/02/020

We study the perturbative dynamics of noncommutative field theories on R^d, and find an intriguing mixing of the UV and the IR. High energies of virtual particles in loops produce non-analyticity at low momentum. Consequently, the low energy effective action is singular at zero momentum even when the original noncommutative field theory is massive. Some of the nonplanar diagrams of these theories are divergent, but we interpret these divergences as IR divergences and deal with them accordingly. We explain how this UV/IR mixing arises from the underlying noncommutativity. This phenomenon is reminiscent of the channel duality of the double twist diagram in open string theory.

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