Speaker
Dr
Wen Yin
(Tokyo Metropolitan University)
Description
The cosmological constant problem, the most serious fine-tuning problem for the standard model parameters, remains a major puzzle, especially in light of Weinberg’s no-go theorem, which forbids natural solutions if dark energy is constant.
Recent DESI observations suggest time variation in dark energy, opening a possible loophole. I present a model that realizes this idea to make the tuning technically natural.
Interestingly the prediction points to a dark energy evolution consistent with DESI DR1 and DR2.