Chameleon Field Theories

Understand

Chameleons are light scalar fields with remarkable properties.

• Through the interplay of self-interactions and coupling to matter, chameleon particles have a mass that depends on the ambient matter density.
• The manifestation of the fifth force mediated by chameleons therefore depends sensitively on their environment, which makes for a rich phenomenology.
• In this article, we review two recent results on chameleon phenomenology.