PIRSA:09050071

Video URL

https://pirsa.org/09050071

Infrared Modification of Gravity with Dynamical Torsion

Randjbar-Daemi, S. (2009). Infrared Modification of Gravity with Dynamical Torsion. Perimeter Institute for Theoretical Physics. https://pirsa.org/09050071

Randjbar-Daemi, Seifallah. Infrared Modification of Gravity with Dynamical Torsion. Perimeter Institute for Theoretical Physics, May. 25, 2009, https://pirsa.org/09050071 

          @misc{ scivideos_PIRSA:09050071,
            doi = {10.48660/09050071},
            url = {https://pirsa.org/09050071},
            author = {Randjbar-Daemi, Seifallah},
            keywords = {Quantum Gravity, Quantum Fields and Strings, Particle Physics, Cosmology},
            language = {en},
            title = {Infrared Modification of Gravity with Dynamical Torsion},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {may},
            note = {PIRSA:09050071 see, \url{https://scivideos.org/index.php/pirsa/09050071}}
          }

Seifallah Randjbar-Daemi The Abdus Salam International Centre for Theoretical Physics (ICTP)

Talk numberPIRSA:09050071
DOI10.48660/09050071
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

Abstract

Theories of gravity having connection as an independent dynamical variable can have a massive spin -2 particle together with the massless graviton in their spectrum. We study the potentiality of such models as a consistent infrared modification of gravity. It will be shown that these models are free from ghost like Boulware-Deser mode in the background of arbitrary torsionless Einstein manifolds. At least for weak for weak enough curvature the dangerous spin zero mode has a healthy kinetic energy in our backgrounds. vDVZ singularity seems to be a generic feature which may be cured by Vainshtein mechanism as in other infrared modified theories of gravity.