2013/02/28 by Ignatios Antoniadis, I. Antoniadis, I. Florakis +7 · 51 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Compactification (mathematics) #Cosmology and Gravitation Theories #Heterotic string theory #Mathematical physics #Mathematics #Moduli space #Multiplet #Particle physics theoretical and experimental studies #Physics #Pure mathematics #Quantum mechanics #String (physics) #String field theory #Supergravity #Supersymmetry #Worldsheet #hep-th
paper · pdf · doi:10.1016/j.nuclphysb.2013.07.004
published in Nuclear Physics B 875(1), 101-133 (Elsevier BV) · 35 pages, typos corrected, published in NPB
openalex publication_date 2013/07/11 · arxiv created 2013/07/22 · arxiv updated 2013/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A worldsheet realization of the refined topological string is proposed in terms of physical string amplitudes that compute generalized N=2 F-terms of the form Fg,n W2gY2n in the effective supergravity action. These terms involve the chiral Weyl superfield W and a superfield Y defined as an N=2 chiral projection of a particular anti-chiral T-bar vector multiplet. In Heterotic and Type I theories, obtained upon compactification on the six-dimensional manifold K3xT2, T is the usual Kähler modulus of the T2 torus. These amplitudes are computed exactly at the one-loop level in string theory. They are shown to reproduce the correct perturbative part of the Nekrasov partition function in the field theory limit when expanded around an SU(2) enhancement point of the string moduli space. The two deformation parameters epsilon- and epsilon+ of the Omega-supergravity background are then identified with the constant field-strength backgrounds for the anti-self-dual graviphoton and self-dual gauge field of the T-bar vector multiplet, respectively.