Reconsidering extra time-like dimensions
高能物理 - 唯象学
2009-01-07 v2 广义相对论与量子宇宙学
高能物理 - 理论
摘要
In this study we reconsider the phenomenological problems related to tachyonic modes in the context of extra time-like dimensions. First we reconsider a lower bound on the size of extra time-like dimensions. Next we discuss the issues of spontaneous decay of stable fermions through tachyonic decays and disappearance of fermions due to tachyonic contributions to their self-energies. We find that the tachyonic modes due to extra time-like dimensions are less problematic than the tachyonic modes in the usual 4-dimensional setting because the most troublesome Feynman diagrams are forbidden once the conservation of momentum in the extra time-like dimensions is imposed.
引用
@article{arxiv.hep-ph/0510207,
title = {Reconsidering extra time-like dimensions},
author = {Recai Erdem and Cem S. Un},
journal= {arXiv preprint arXiv:hep-ph/0510207},
year = {2009}
}
备注
The version to appear in EPJC