  Dynamical theories of dark energy predict new degrees of freedom with
particular environmental sensitivity to avoid constraints on fifth forces. We
show that the similar, yet complementary multi-purpose detector setup of the
ATLAS and CMS experiments provides a unique opportunity to place sensitivity on
such scenarios in a narrow, yet relevant parameter range. Furthermore, our
investigation gives rise to a novel phenomenological signature that the LHC
experiments can pursue to exploit their complementary detector design from a
BSM perspective.
