  A primary objective of exoplanet atmosphere characterisation is to learn
about planet formation and evolution, however, this is challenged by
degeneracies. To determine whether differences in atmospheric composition can
be reliably traced to differences in evolution, we are undertaking a new survey
with JWST to compare the compositions of a sample of hot Jupiters that orbit F
stars above the Kraft break with different orbital alignments. Under the
assumption that aligned planets migrate through the inner disc, while
misaligned planets migrate after disc dispersal, the act of migrating through
the inner disc should lead to a measurable difference in the C/O between
aligned and misaligned planets. We expect the amplitude and sign of this
difference to depend on the amount of planetesimal accretion and whether
silicates accreted from the inner disc release their oxygen. Here, we identify
all known exoplanets that are suitable for testing this hypothesis, describe
our JWST survey, and use noise simulations and atmospheric retrievals to
estimate our survey's sensitivity. With the selected sample of four aligned and
four misaligned hot Jupiters, we will be sensitive to the predicted differences
in C/O between aligned and misaligned hot Jupiters for a wide range of model
scenarios.
