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In order to describe this operad we use the orthogonal categories of Benini, Schenkel, and Woike and the prefactorization functor of Benini, Carmona, Grant-Stuart, and Schenkel. Along the way we extend these constructions to the topological setting, i.e., (multi-)categories enriched over spaces.<\/jats:p>","DOI":"10.1007\/s10485-026-09874-y","type":"journal-article","created":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T15:20:23Z","timestamp":1779204023000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Causally Disjoint Discs: Another $$\\mathbb {E}_n$$-Operad"],"prefix":"10.1007","volume":"34","author":[{"given":"Ryan","family":"Grady","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,19]]},"reference":[{"key":"9874_CR1","unstructured":"Benini, M., Carmona, V., Grant-Stuart, A., Schenkel, A.: On the equivalence of AQFTs and prefactorization algebras (2024). arXiv:2412.07318"},{"issue":"1","key":"9874_CR2","doi-asserted-by":"publisher","first-page":"36","DOI":"10.1007\/s11005-024-01784-1","volume":"114","author":"M Benini","year":"2024","unstructured":"Benini, M., Musante, G., Schenkel, A.: Quantization of Lorentzian free BV theories: factorization algebra vs algebraic quantum field theory. 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