  The Anderson-Higgs mode in a superconductor corresponds to a collective and
coherent oscillation of the order parameter amplitude. We propose to detect
this mode in a tunnel Josephson junction between two singlet s-wave diffusive
superconductors. We find a strong enhancement of the tunneling current when the
junction is pumped at the equilibrium gap frequency, corresponding to the
activation of the Anderson-Higgs mode. By solving the Keldysh-Usadel equations,
we obtain current peaks at specific bias voltages that can serve as signatures
of the Anderson-Higgs mode.
