Speaker
Ms
Irene Valenzuela
(IFT UAM/CSIC)
Description
Consistency with quantum gravity can have significant consequences on low energy physics. Interestingly, it seems that not every effective field theory can be consistently coupled to quantum gravity unless it satifies some additional consistency constraints. Recently substantial effort has been dedicated to determine these constraints in terms of black-hole physics and string theory. Some proposals, dubbed Quantum Gravity Conjectures, would imply thattheories with small gauge couplings or parametrically large scalar field variations are inconsistent with quantum gravity. This can have important phenomenological implications for Beyond Standard Model proposals and Inflationary Cosmology models. Furthermore, when applying one of this conjectures to compactifications of the Standard Model, we obtain a lower bound for the cosmological constant in terms of the neutrino masses. This can also be translated into an upper bound for the EW scale around the TeV range, bringing a new perspective into the issue of the EW hierarchy.
