Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-04-20
Nucl.Phys.B697:48-88,2004; Erratum-ibid.B750:108-109,2006
Physics
High Energy Physics
High Energy Physics - Theory
48 pages, v2: improved version with some corrections
Scientific paper
10.1016/j.nuclphysb.2004.07.021
We analyze the Neveu-Schwarz fivebrane instanton in type IIA string theory compactifications on rigid Calabi-Yau threefolds, in the low-energy supergravity approximation. It there appears as a finite action solution to the Euclidean equations of motion of a double-tensor multiplet (dual to the universal hypermultiplet) coupled to N=2, D=4 supergravity. We determine the bosonic and fermionic zero modes, and the single-centered instanton measure on the moduli space of collective coordinates. The results are then used to compute, in the semiclassical approximation, correlation functions that nonperturbatively correct the universal hypermultiplet moduli space geometry of the low-energy effective action. We find that only the Ramond-Ramond sector receives corrections, and we discuss the breaking of isometries due to instantons.
Davidse Marijn
Theis Ulrich
Vandoren Stefan
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