SÉMINAIRE DU GRECO
"Self-tuning and the cosmological constant problem" |
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Christos Charmousis |
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We will discuss the cosmological constant problem in the context of self-tuning scalar tensor theories in 4 dimensions: can a scalar self-tune to an abruptly changing cosmological constant without affecting the spacetime metric? After reviewing the most general scalar tensor theory proposed in the 70's by Hornedski we shall define and then apply the self-tuning filter. The self tuning theory will be a scalar tensor theory dubbed fab 4. We shall briefly discuss some of its geometric and other properties. |
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lundi 14 mai 2012 - 11:00 Salle des séminaires François Arago , Institut d'Astrophysique de Paris |
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