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Signals for Non-Commutative QED in $e gamma$ and $gamma gamma$ Collisions | | Stephen Godfrey
; M. A. Doncheski
; | | Date: |
12 Nov 2001 | | Journal: | eConf C010630 (2001) P313 | | Subject: | hep-ph | | Abstract: | We study the effects of non-commutative QED (NCQED) in fermion pair production, $gamma + gamma o f + ar{f}$ and Compton scattering, $e + gamma o e + gamma$. Non-commutative geometries appear naturally in the context of string/M-theory and gives 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 $gamma gamma$ and $egamma$ modes. Non-commutative 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 found that the Compton process is sensitive to $Lambda_{NC}$ values roughly twice as large as those accessible to the pair production process. | | Source: | arXiv, hep-ph/0111147 | | Services: | Forum | Review | PDF | Favorites | |
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