Astronomy and Astrophysics Seminars
Short Distance Freedom of Quantum Gravity
by Dr. Gaurav Narain (IMSc Chennai)
Thursday, April 4, 2013
from
to
(Asia/Kolkata)
at Colaba Campus ( DAA A269 )
at Colaba Campus ( DAA A269 )
TIFR
Description |
In 3+1 space-time dimensions, fourth order derivative gravity is perturbatively renormalizable. Here it is shown that it describes a unitary theory of gravitons (with/without an additional scalar) in a limited coupling parameter space which includes standard cosmology. The running of gravitational constant which includes contribution of graviton is computed. It is shown that generically Newton's constant vanishes at short distance in this perturbatively renormalizable and unitary theory. |