# Proton decay, black holes, and large extra dimensions

 Redirect: RIT Scholars content from RIT Digital Media Library has moved from http://ritdml.rit.edu/handle/1850/2008 to RIT Scholar Works http://scholarworks.rit.edu/article/1543, please update your feeds & links! Title: Proton decay, black holes, and large extra dimensions Author: Adams, Fred; Kane, Gordon; Mbonye, Manasse; Perry, Malcolm Abstract: We consider proton decay in theories that contain large extra dimensions. If virtual black hole states are allowed by the theory, as is generally the case, then proton decay can proceed via virtual black holes. The experimental limits on the proton lifetime place strong constraints on the quantum gravity scale $\mnew$ (the effective Planck mass). For most theories, our constraint implies a lower bound of $\mnew > 10^{16}$ GeV. The corresponding bound on the size of large extra dimensions is $\ell < 10^{6/n} \times 10^{-30}$ cm, where $n$ is the number of such dimensions. Regrettably, for most theories this limit rules out the possibility of observing large extra dimensions at accelerators or in millimeter scale gravity experiments. Conversely, proton decay could be dominated by virtual black holes, providing an experimental probe to study stringy quantum gravity physics. (Refer to PDF file for exact formulas.) Description: Also archived at: arXiv:hep-ph/0009154 v2 1 Mar 2001 Record URI: http://hdl.handle.net/1850/2008 Date: 2001-05-20

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