Phenomenology of non-commutative field theories

Abstract

We study the effects of non-commutative QED (NCQED) in fermion pair production, #gamma# + #gamma# #->#f+f and compton scattering, e+#gamma# #-># e + #gamma#. Non-commutative geometries 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 #gamma##gamma# and e#gamma# 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. The Compton process is sensitive to #LAMBDA#_N_C values roughly twice as large as those accessible to the pair production process. (orig.)Available from TIB Hannover: RA 2999(02-195) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman