Vanishing dimensions: theory and phenomenology

Understand

Lower-dimensionality at higher energies has manifold theoretical advantages as recently pointed out.

• Moreover, it appears that experimental evidence may already exists for it - a statistically significant planar alignment of events with energies higher than TeV has been observed in some earlier cosmic ray experiments.
• If this alignment is not a fluke, then the LHC should be able to see effects associated with the dimensional crossover.
• Further, (2+1)-dimensional spacetimes have no gravitational degrees of freedom, and gravity waves cannot be produced in that epoch in the early universe.