The automorphic NS5-brane

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Pioline, B. (author)

The automorphic NS5-brane

Article/chapterEnglish2009

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International Press of Boston,2009

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LIBRIS-ID:oai:research.chalmers.se:f8e6fe95-f72e-4091-8c89-fa4211465bc2
https://doi.org/10.4310/cntp.2009.v3.n4.a5DOI
https://research.chalmers.se/publication/137542URI

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Language:English
Summary in:English

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Subject category:vet swepub-contenttype

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Understanding the implications of SL(2, Z) S-duality for the hyper-multiplet moduli space of type II string theories has led to much progress recently in uncovering D-instanton contributions. In this work, we suggest that the extended duality group SL(3, Z), which includes both S-duality and Ehlers symmetry, may determine the contributions of D5 and NS5-branes. We support this claim by automorphizing the perturbative corrections to the "extended universal hypermultiplet," a five-dimensional universal SO(3)\SL(3, R) subspace which includes the string coupling, overall volume, Ramond zero-form and six-form and NS axion. Using the non-Abelian Fourier expansion of the Eisenstein series attached to the principal series of SL(3, R), worked out many years ago by Vinogradov, Takhtajan and Bump, we extract the contributions of D(-1)-D5 and NS5-brane instantons, corresponding to the Abelian and non-Abelian coefficients, respectively. In particular, the contributions of k NS5-branes can be summarized into a vector of wave functions Psi(k,l), l = 0,..., k - 1, as expected on general grounds. We also point out that for more general models with a symmetric moduli space K\G, the minimal theta series of G generates an infinite series of exponential corrections of the form required for "small" D(-1)-D1-D3-D5-NS5 instanton bound states. As a mathematical spin-off, we make contact with earlier results in the literature about the spherical vectors for the principal series of SL(3, R) and for minimal representations.

Subject headings and genre

NATURVETENSKAP Fysik Subatomär fysik hsv//swe
NATURAL SCIENCES Physical Sciences Subatomic Physics hsv//eng

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Persson, Daniel,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)danper (author)
Chalmers tekniska högskola (creator_code:org_t)

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In:Communications in Number Theory and Physics: International Press of Boston3:4, s. 697-7541931-45311931-4523

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