On asymptotic symmetries in higher dimensions for any spin

Understand

We investigate asymptotic symmetries in flat backgrounds of dimension higher than or equal to four.

• For spin two we provide the counterpart of the extended BMS transformations found by Campiglia and Laddha in four-dimensional Minkowski space.
• We then identify higher-spin supertranslations and generalised superrotations in any dimension.
• These symmetries are in one-to-one correspondence with spin-$s$ partially-massless representations on the celestial sphere, with supertranslations corresponding in particular to the representations with maximal depth.