Bounds on graviton mass using weak lensing and SZ effect in galaxy clusters

Understand

In General Relativity (GR), the graviton is massless.

• However, a common feature in several theoretical alternatives of GR is a non-zero mass for the graviton.
• These theories can be described as massive gravity theories.
• Despite many theoretical complexities in these theories, on phenomenological grounds, the implications of massive gravity have been widely used to put bounds on graviton mass.