On electric charge non-conservation in brane world
Abstract
Description
In some models with infinite extra dimensions, gauge fields are localized on a brane by gravity. A generic property of these models is the existence of arbitrarily light bulk modes of charged fields. This property may lead to interesting low-energy effects such as electric charge non-conservation on the brane (decay of electron to nothing). One may worry that light charged Kaluza--Klein modes would lead to unacceptable phenomenology due to their copious production in, e.g., electron-positron annihilation and/or their contribution to QED observables like anomalous magnetic moments. We argue, however, that both loop effects and production of light charged Kaluza--Klein modes are suppressed due to screening effect of gapless spectrum of bulk photons.
14 pages, 4.ps figures; Prepared for Proceedings of Francqui Meeting on Strings and Gravity: Tying the Forces Together, Brussels, Belgium, 19-21 Oct. 2001 and Proceedings of XXXVII Rencontres de Moriond, Les Arcs, France, 9-16 March 2002
14 pages, 4.ps figures; Prepared for Proceedings of Francqui Meeting on Strings and Gravity: Tying the Forces Together, Brussels, Belgium, 19-21 Oct. 2001 and Proceedings of XXXVII Rencontres de Moriond, Les Arcs, France, 9-16 March 2002