Extended Hořava Gravity with Physical Ground-State Wavefunction

Details Extended Hořava Gravity with Physical Ground-State Wavefunction Extended Hořava Gravity with Physical Ground-State Wavefunction

2010-09-20

arxiv.org/abs/1009.3677v1

Physics

High Energy Physics

High Energy Physics - Theory

15 pages,no figure

Scientific paper

We propose a new extended theory of Ho\v{r}ava gravity based on the following three conditions: (i) UV completion, (ii) healthy IR behavior and (iii) a stable vacuum state in quantized version of the theory. Compared with other extended theories, we stress that any realistic theory of gravity must have physical ground states when quantization is performed. To fulfill the three conditions, we softly break the detailed balance but keep its basic structure unchanged. It turns out that the new model constructed in this way can avoid the strong coupling problem and remains power-counting renormalizable, moreover, it has a stable vacuum state by an appropriate choice of parameters.

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