1211.6858 (Yoske Sumitomo et al.)

Preference for a Vanishingly Small Cosmological Constant in
Supersymmetric Vacua in a Type IIB String Theory Model    [PDF]

Yoske Sumitomo, S. -H. Henry Tye

We study the probability distribution P(\Lambda) of the cosmological constant \Lambda in a specific set of KKLT type models of supersymmetric IIB vacua. P(\Lambda) is divergent at \Lambda =0^- and the likely value of \Lambda drops exponentially as the number of complex structure moduli h^{2,1} increases. Also, owing to the hierarchical and approximate no-scale structure, the probability of having a positive Hessian (mass squared matrix) approaches unity as h^{2,1} increases.

View original: http://arxiv.org/abs/1211.6858