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Half-hypermultiplets and incomplete/complete resolutions in F-theory
Journal of High Energy Physics
We consider resolutions of codimension-two enhanced singularities from SO( 12 ) to E 7 and from E 7 to E 8 in six-dimensional F-theory, where a half-hypermultiplet arises for generic complex structures achieving them. The exceptional fibers at the enhanced point exhibit different structures depending on how the colliding 7-brane approaches the stack of gauge 7-branes, as previously observed by Morrison and Taylor in the case of the enhancement from SU(6) to E 6 . When the colliding branedoi:10.1007/jhep08(2020)063 fatcat:ki6abx7whzgibdcgr5t5g3z7ye