@article{oai:oist.repo.nii.ac.jp:00002183,
 author = {Albrychiewicz, Emil and Neiman, Yasha},
 issue = {6},
 journal = {Physical Review D},
 month = {Mar},
 note = {We study the scattering problem in the static patch of de Sitter space, i.e., the problem of field evolution between the past and future horizons of a de Sitter observer. We calculate the leading-order scattering for a conformally massless scalar with cubic interaction, as both the simplest case and a warm-up towards Yang-Mills and gravity. Our strategy is to decompose the static-patch evolution problem into a pair of more symmetric evolution problems in two Poincare patches, sewn together by a spatial inversion. To carry this out explicitly, we end up developing formulas for the momentum-space effect of inversions in flat spacetime. The geometric construction of an electron's 4-momentum and spin vectors from a Dirac spinor turns out to be surprisingly relevant.},
 title = {Scattering in the static patch of de Sitter space},
 volume = {103},
 year = {2021}
}