PIRSA:06010005

Gravity and cosmology of the dilaton at "strong coupling"

APA

Piazza, F. (2006). Gravity and cosmology of the dilaton at "strong coupling". Perimeter Institute. https://pirsa.org/06010005

MLA

Piazza, Federico. Gravity and cosmology of the dilaton at "strong coupling". Perimeter Institute, Jan. 17, 2006, https://pirsa.org/06010005

BibTex

          @misc{ pirsa_06010005,
            doi = {10.48660/06010005},
            url = {https://pirsa.org/06010005},
            author = {Piazza, Federico},
            keywords = {Cosmology},
            language = {en},
            title = {Gravity and cosmology of the dilaton at "strong coupling"},
            publisher = {Perimeter Institute},
            year = {2006},
            month = {jan},
            note = {PIRSA:06010005 see, \url{https://pirsa.org}}
          }
          

Federico Piazza CPT Marseille

Abstract

A definite prediction of string theory is the existence of a scalar field, the dilaton. The presence of the dilaton generally leads to strong violations of the equivalence principle and thus describe a kind of gravitational force radically different from what we experience. String loop corrections, however, may render phenomenologically acceptable the region of the theory characterized by large values of the dilaton field i.e. the region with a strong tree level-coupling. Interestingly, in this framework, violations of the (weak) equivalence principle should be observed in the next satellite-based generation of experiments. A dilaton running towards infinity can also play the role of coupled dark energy and ease the so-called "cosmic coincidence" problem.