Signals for noncommutative QED in eγ and γγ collisions

Stephen Godfrey, M. A. Doncheski

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49 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 Λ NC 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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