  We consider quantum quenches to the sinh-Gordon integrable quantum field
theory from a particular class of initial states. Our analysis includes the
case of mass and interaction quenches starting from a non-interacting theory.
By means of the recently developed quench action method, we fully characterize
the stationary state reached at long times after the quench in terms of the
corresponding rapidity distribution. We also provide exact results for the
expectation values of arbitrary vertex operators in the post-quench stationary
state by proposing a formula based on the analogy with the standard
thermodynamic Bethe ansatz. Finally, we comment on the behavior of the
post-quench stationary state under the mapping between the sinh-Gordon field
theory and the one-dimensional Lieb-Liniger model.
