AT2 - Extended Theories of Gravity and Quantum Cosmology |
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Speaker |
Carballo Rubio, Raúl |
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Coauthors |
Barceló, Carlos; Garay, Luis J. |
| Talk Title |
On the Link Between the Cosmological Constant and Spacetime |
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Abstract |
The cosmological constant problem can be understood as the failure of the decoupling principle behind effective field theory, so that some quantities in the low-energy theory (general relativity plus the standard model of particle physics) are extremely sensitive to the high-energy properties. While this reflects the genuine character of the cosmological constant, finding an adequate effective field theory framework which avoids this naturalness problem may represent a step forward to understand nature. Following this intuition, we consider a minimal modification of the structure of general relativity which as an effective theory permits to work consistently at low energies, i.e., below the quantum gravity scale. This proposal respects the classical phenomenology of general relativity and the particle spectrum of the standard model, at the price of changing the usual picture of spacetime. |
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