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Instanton Correctio...
Instanton Corrections to the Universal Hypermultiplet and Automorphic Forms on SU(2,1)
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- Persson, Daniel, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nilsson, Bengt E W, 1952 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bao, Ling, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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Kleinschmidt, Axel (författare)
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Pioline, Boris (författare)
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visa färre...
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(creator_code:org_t)
- 2009
- 2009
- Engelska.
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Ingår i: Preprint: arXiv:0909.4299 [hep-th]. ; , s. 55 pages-
- Relaterad länk:
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https://research.cha...
Abstract
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- The hypermultiplet moduli space in Type IIA string theory compactified on a rigid Calabi-Yau threefold X, corresponding to the "universal hypermultiplet", is described at tree-level by the symmetric space SU(2,1)/(SU(2) x U(1)). To determine the quantum corrections to this metric, we posit that a discrete subgroup of the continuous tree-level isometry group SU(2,1), namely the Picard modular group SU(2,1;Z[i]), must remain unbroken in the exact metric -- including all perturbative and non perturbative quantum corrections. This assumption is expected to be valid when X admits complex multiplication by Z[i]. Based on this hypothesis, we construct an SU(2,1;Z[i])-invariant, non-holomorphic Eisenstein series, and tentatively propose that this Eisenstein series provides the exact contact potential on the twistor space over the universal hypermultiplet moduli space. We analyze its non-Abelian Fourier expansion, and show that the Abelian and non-Abelian Fourier coefficients take the required form for instanton corrections due to Euclidean D2-branes wrapping special Lagrangian submanifolds, and to Euclidean NS5-branes wrapping the entire Calabi-Yau threefold, respectively. While this tentative proposal fails to reproduce the correct one-loop correction, the consistency of the Fourier expansion with physics expectations provides strong support for the utility of the Picard modular group in constraining the quantum moduli space.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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