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arXiv:hep-th/9912072hep-th

Noncommutative Perturbative Dynamics

Shiraz Minwalla, Mark Van Raamsdonk, Nathan Seiberg

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Abstract

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.

arXiv comments
33 pages, 17 figures, harvmac; v2 minor changes
Journal reference
JHEP 0002:020,2000
DOI
doi:10.1088/1126-6708/2000/02/020
Subjects
hep-thHigh Energy Physics, Theory

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