Orientifolding Kreuzer-Skarke

Published 10 May 2023 in hep-th | (2305.06363v1)

Abstract: We develop tools that allow the systematic enumeration of inequivalent holomorphic orientifolds of Calabi-Yau hypersurfaces in toric fourfolds of arbitrary Hodge numbers. As examples, we construct an orientifold of the Calabi-Yau hypersurface with largest known Hodge number $h^{1,1}=491$, as well as an orientifold of a Calabi-Yau hypersurface with $h^{1,1}=243$ that yields a large orientifold-odd Hodge number $h^{{1,1}_-=120$.}