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A new scale in the sky

M. Gasperini

hep-tharXiv:hep-th/0611227

Abstract

The existence of a new ultraviolet scale Λ=g MP for effective theories with gravity and U(1) gauge fields has recently been conjectured as a possible criterion for distinguishing parts of the swampland from the string landscape. Here we discuss a possible phenomenological signature of this scale, for electromagnetic fields, in astrophysical observations.

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