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Reconsidering extra time-like dimensions

Recai Erdem·Cem S. Un
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Abstract

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.

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Recai Erdem, Cem S. Un. 2006-07-03. Reconsidering extra time-like dimensions. https://doi.org/10.1140/epjc%2Fs2006-02587-5

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