2009/01/31 by Marco Chiodaroli, Michael Gutperle
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-th
paper · pdf · doi:10.1103/physrevd.79.085023
published as Phys.Rev.D79:085023,2009 · 57 pages, 4 figures, pdflatex, v2: references and some clarifications added,v3: reference corrected and figures modified
arxiv created 2009/04/12 · openalex publication_date 2009/04/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this paper, we construct Euclidean instanton and wormhole solutions in d=4, N=2 supergravity theories with hypermultiplets. The analytic continuation of the hypermultiplet action, involving pseudoscalar axions, is discussed using the approach originally developed by Coleman, which determines the appearance of boundary terms. In particular, we investigate the conditions obtained by requiring the action to be positive definite once the boundary terms are taken into account. The case of two hypermultiplets parameterizing the coset G2,2/SU(2)\ifmmode×\else\texttimes\fiSU(2) is studied in detail. Orientifold projections that reduce the supersymmetry to N=1 are also discussed.