String Theory Seminar
Thursday, March 1, 2001, 4:00pm
Albion Lawrence
(Stanford University)
A large class of string compactifications are warped products of the
compactification manifold and our four-dimensional spacetime, where the
spacetime metric depends on the position in the compactification manifold.
New, calculable regimes will arise when warp factors are large and when
several different regions with interesting physics are spatially separated
in the compactification manifold. We discuss a variant of the Randall-Sundrum
scenario which, at low energies, captures the essential features of this
regime. We discuss the low-energy effective theory of such a scenario,
including the important scales and leading irrelevant operators. We comment
critically on the conjectured relationship between the Randall-Sundrum
proposal and the AdS/CFT correspondence.
Finally, we discuss some phenomenological consequences of these models:
namely, a new mediation mechanism for supersymmetry breaking,
and a dark matter candidate which might explain some
puzzles in the structure of galactic dark matter halos.
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