Generating Small Numbers by Tunneling in Multi-Throat Compactifications
摘要
A generic F-theory compactification containing many D3 branes develops multiple brane throats. The interaction of observers residing inside different throats involves tunneling suppression and, as a result, is very weak. This suggests a new mechanism for generating small numbers in Nature. One application is to the hierarchy problem: large supersymmetry breaking near the unification scale inside a shallow throat causes TeV-scale SUSY-breaking inside the standard-model throat. Another application, inspired by nuclear-decay, is in designing naturally long-lived particles: a cold dark matter particle residing near the standard model brane decays to an approximate CFT-state of a longer throat within a Hubble time. This suggests that most of the mass of the universe today could consist of CFT-matter and may soften structure formation at sub-galactic scales. The tunneling calculation demonstrates that the coupling between two throats is dominated by higher dimensional modes and consequently is much larger than a naive application of holography might suggest.
引用
@article{arxiv.hep-th/0106128,
title = {Generating Small Numbers by Tunneling in Multi-Throat Compactifications},
author = {S. Dimopoulos and S. Kachru and N. Kaloper and A. Lawrence and E. Silverstein},
journal= {arXiv preprint arXiv:hep-th/0106128},
year = {2010}
}
备注
55 pages, 2 figures, v2: typo corrected