Qu’est-ce que la gravité ? A book by Pierre Vanhove, Philippe Brax, Etienne Klein
26/06/2019
Qu’est-ce que la gravité ? A book by Pierre Vanhove, Philippe Brax, Etienne Klein
General relativity has just celebrated its centenary and the early detection of gravitational waves by LIGO and Virgo has confirmed Einstein's prediction that accelerated masses can produce an oscillation of space-time spreading at the speed of light.

24th Itzykson meeting: Effective Field Theory in Cosmology, Gravitation and Particle Physics, 5-7 juin 2019, IPhT
21/02/2019
24th Itzykson meeting: Effective Field Theory in Cosmology, Gravitation and Particle Physics, 5-7 juin 2019, IPhT
Organizing commitee: Brando Bellazzini, John Joseph Carrasco and Filippo Vernizzi

Maximal Supergravity at Five Loops !
18/12/2018
Maximal Supergravity at Five Loops !
Single (top) vs double copy (bottom) theory This past year a team at IPhT around John Joseph Carrasco — in collaboration with physicists at UCLA and Penn State University in the United States, and Uppsala University in Sweden — completed a calculation long thought to be impossible: the direct understanding of the dimensions of space-time in which the most symmetric particle-based field theory of gravity (maximal supergravity) would cease to be predictive when quantum effects are relevant. One can isolate order by order the quantum effects in graviton scattering. For two gravitons scattering off of each other, this calculation required consideration of the fifth-order quantum correction. This puts strong constraints on the behavior of fundamental symmetries in controlling the high-energy behavior of this theory.
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