Loops, local corrections and warping in the LVS and other type IIB models

A bstract To establish metastable de Sitter vacua or even just scale-separated AdS, control over perturbative corrections to the string-derived leading-order 4d lagrangian is crucial. Such can be classified in three types: first, there are genuine loop effects, insensitive UV completion of 10d theory. Second, local α ′ or, equivalently, higher-dimension operators which may not related loop-effects. Third, warping affect Kahler potential but expected violate no-scale structure. With this classification mind, we attempt derive Berg-Haack-Pajer conjecture for type-IIB Calabi-Yau orientifolds and extend it include further terms. This crucial since interesting applications context generic geometries rather than torus-based models from main motivation originally stems. As an important by-product, resolve a known apparent inconsistency between parametric behaviour string results field-theoretic expectations. Our findings lead some new statements concerning effects associated with blowup-cycles, fibre inflation, possible logarithmic scalar potential.