Universal class of type-IIB flux vacua with analytic mass spectrum.

We report on a new class of flux vacua generically present in Calabi-Yau compactifications of type-IIB string theory. At these vacua, the mass spectrum of the complete axiodilaton/complex structure sector is given, to leading order in α′ and gs, by a simple analytic formula independent of the choice of Calabi-Yau. We provide a method to find these vacua and construct an ensemble of 17,054 solutions for the Calabi-Yau hypersurface WP4[1,1,1,6,9], where the masses of the axiodilaton and the 272 complex structure fields can be explicitly computed. [ABSTRACT FROM AUTHOR]