Supersymmetric noncommutative QED and Lorentz violation

We consider Lorentz-violating operators induced at the loop level in softly-broken supersymmetric noncommutative QED. Dangerous operators forbidden in the supersymmetric limit are generated via finite corrections, with the scale of supersymmetry breaking serving as a gauge-invariant regulator. We compare the most dangerous loop effects to those obtained in noncommutative theories truncated by a momentum-space cutoff, and find significantly improved bounds.

quantum electrodynamics: noncommutative
supersymmetry: symmetry breaking
violation: Lorentz
Feynman graph: higher-order
numerical calculations

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