Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-03-08
JHEP0709:121,2007
Physics
High Energy Physics
High Energy Physics - Theory
30 pages, LaTeX. v2: references added, typos fixed
Scientific paper
10.1088/1126-6708/2007/09/121
D3-branes feel no force in no-scale flux compactifications of type IIB string theory, but the nonperturbative effects required to stabilize the Kahler moduli break the no-scale structure and generate a potential for D3-brane motion, confining the branes to certain loci. D3-branes away from these loci break supersymmetry spontaneously, by an F-term. We present the general conditions for supersymmetric D3-brane vacua in models with a single Kahler modulus, then explicitly calculate these vacua for D3-branes moving on the tip of the warped deformed conifold. We find both continuous moduli spaces and isolated vacua. In addition, we show that anti-D3-branes and D3-branes are localized to the same regions by the nonperturbative potential, avoiding a potential obstacle to brane inflation. We apply these results to determine whether angular motion of a brane in a throat could play an important role in inflation, and find that any inflation along the angular directions is short-lived because the field space is very small.
DeWolfe Oliver
McAllister Liam
Shiu Gary
Underwood Bret
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