Mirror World versus large extra dimensions

TL;DR

This paper explores the implications of low-scale quantum gravity on the Mirror World hypothesis, analyzing potential collider signatures, decay processes, and the energetic impact of mirror supernovae.

Contribution

It investigates how TeV-scale gravity affects Mirror World detection prospects, including collider signatures and astrophysical phenomena, providing new insights into observable effects.

Findings

Future colliders could produce mirror matter events.

Decays like $a(2S)\to \tilde \chi_{b2} \gamma$ are potential signatures but have very small branching ratios.

Mirror supernovae could emit significant ordinary energy, producing observable astrophysical signals.

Abstract

Recently proposed low scale quantum gravity scenario is expected to have a significant impact on the Mirror World hypothesis. Some aspects of this influence is investigated here, assuming that the fundamental gravity scale is near a TeV. It is shown that future colliders will be capable to produce the mirror matter, but an experimental signature, which will distinguish such events from the background, is unclear. The `smoking gun'' signals of the Mirror World would be an observation of decays like $\Upsilon(2S)\to \tilde \chi_{b2} \gamma $. But unfortunately the expected branching ratios are very small. Finally, it is shown that a mirror supernova will be quite a spectacular event for our world too, because a considerable amount of ordinary energy is expected to be emitted in the first several seconds.