We study 4D QED in which one spatial dimension is dynamically generated from the 3D action, following the mechanism proposed by Arkani-Hamed, Cohen, and Georgi. In this model, the generated fourth dimension is discretized by an interval parameter a. We examine the phenomenological constraint on the parameter a coming from collider experiments on the QED process e+e-→γγ. It is found that the CERN e+e- collider LEP2 experiments give the constraint of 1/a≳461 GeV. The expected bound on the same parameter a at a future e+e- linear collider is briefly discussed.
Physical Review D
- Pub Date:
- December 2002
- Compactification and four-dimensional models;
- High Energy Physics - Phenomenology
- 16 pages, latex2e, 5 figures. Version to appear in Phys.Rev.D