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  • (Non-)BPS bound states and D-brane instantons
    Cvetič, Mirjam ; Richter, R. ; Weignad, Timo
    We study non-perturbative effects in four-dimensional N = 1 supersymmetric orientifold compactifications due to D-brane instantons which are not invariant under the orientifold projection. We show ... that they can yield superpotential contributions via a multi-instanton process at threshold. Some constituents of this configuration form bound states away from the wall of marginal stability which can decay in other regions of moduli space. A microscopic analysis reveals how contributions to the superpotential are possible when new BPS states compensate for their decay. We study this concretely for D2-brane instantons along decaying special Lagrangians in Type IIA and for D5-branes instantons carrying holomorphic bundles in Type I theory.
    Vir: The Journal of high energy physics. - ISSN 1126-6708 (Issue 7, 2008, art. no 12)
    Vrsta gradiva - članek, sestavni del
    Leto - 2008
    Jezik - angleški
    COBISS.SI-ID - 65782529

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