Abstract The Kaluza-Klein (KK) decomposition of higher-dimensional gravity gives rise to a tower of KK-gravitons in the effective four-dimensional (4D) theory. Such massive spin-2 fields are known to be connected with unitarity issues and easily lead to a breakdown of the effective theory well below the naive scale of the interaction. However. the breakdown of the effective 4D theory ... https://www.countryscenesaddleryandpetsuppliers.shop/product-category/leather-headstall-and-breastcollar-set-with-beaded-inlay-and-suede-leather-fringe/