Signals for noncommutative QED in eγ and γγ collisions

Stephen Godfrey, M. A. Doncheski

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53 Scopus citations


We study the effects of noncommutative QED (NCQED) in fermion pair production, γ+ γ→f + f̄, and Compton scattering, e+ γ→e + γ. Non-commutative geometries appear naturally in the context of string or M theory and give rise to 3- and 4-point photon vertices and to momentum dependent phase factors in QED vertices which will have observable effects in high energy collisions. We consider e+e - colliders with energies appropriate to the TeV linear collider proposals and the multi-TeV CLIC project operating in γγ and eγ modes. Noncommutative scales roughly equal to the center of mass energy of the e+e- collider can be probed, with the exact value depending on the model parameters and experimental factors. However, we find that the Compton process is sensitive to ΛNC values roughly twice as large as those accessible to the pair production process.

Original languageEnglish (US)
Article number015005
JournalPhysical Review D
Issue number1
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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