Exact low-energy effective actions for hypermultiplets in four dimensions

Research output: Contribution to journalReview article

Abstract

We consider the general hypermultiplet low-energy effective action (LEEA) that may appear in quantized, four-dimensional, N = 2 supersymmetric, gauge theories, e.g. in the Coulomb and Higgs branches. Our main purpose is a description of the exact LEEA of n magnetically charged hypermultiplets. The hypermultiplet LEEA is given by the N = 2 supersymmetric nonlinear sigma-model (NLSM) with a 4n-dimensional hyper-Kahler metric, subject to nonanomalous symmetries. Harmonic superspace (HSS) and the NLSM isometries are very useful to constrain the hyper-Kahler geometry of the LEEA. We use N = 2 supersymmetric projections of HSS superfields to N = 2 linear (tensor) O(2) and O(4) multiplets in N = 2 projective superspace (PSS) to deduce the explicit form of the LEEA in some particular cases. As the by-product, a simple new classification of all multimonopole moduli space metrics having su(2)R symmetry is proposed in terms of real quartic polynomials of 2n variables, modulo Sp(n) transformations. The 4d hypermultiplet LEEA for n = 2 can be encoded in terms of an elliptic curve.

Original languageEnglish
Pages (from-to)2661-2713
Number of pages53
JournalInternational Journal of Modern Physics A
Volume15
Issue number17
DOIs
Publication statusPublished - 10 Jul 2000

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energy
metric space
harmonics
symmetry
gauge theory
polynomials
projection
fine structure
tensors
curves
geometry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics

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Exact low-energy effective actions for hypermultiplets in four dimensions. / Ketov, Sergei V.

In: International Journal of Modern Physics A, Vol. 15, No. 17, 10.07.2000, p. 2661-2713.

Research output: Contribution to journalReview article

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