Astrophysical Constraints on Large Extra Dimensions
高能物理 - 唯象学
2009-09-15 v2 天体物理学
摘要
In the Kaluza-Klein (KK) scenario with n large extra dimensions where gravity propagates in the 4+n dimensional bulk of spacetime while gauge and matter fields are confined to a four dimensional subspace, the light graviton KK modes can be produced in the Sun, red giants and supernovae. We study the energy-loss rates through photon-photon annihilation, electron-positron annihilation, gravi-Compton-Primakoff scattering, gravi-bremsstrahlung and nucleon-nucleon bremsstrahlung, and derive lower limits to the string scale M_S. The most stringent lower limit obtained from SN1987A leads to TeV (2.1-9.2 TeV) for the case of two (three) large extra dimensions.
引用
@article{arxiv.hep-ph/9905474,
title = {Astrophysical Constraints on Large Extra Dimensions},
author = {V. Barger and T. Han and C. Kao and R. -J. Zhang},
journal= {arXiv preprint arXiv:hep-ph/9905474},
year = {2009}
}
备注
12 pages, 4 figures, 2 tables; minor corrections, references added