### Abstract

The non-perturbative corrections to the universal hypermultiplet moduli space metric in the type-IIA superstring compactification on a Calabi - Yau threefold are investigated in the presence of 4d, N = 2 supergravity. These corrections come from multiple wrapping of the BPS (Euclidean) D2-branes around certain (BPS) Calabi - Yau 3-cycles, and they are known as the D-instantons. The exact universal hypermultiplet metric is governed by a quaternionic potential that satisfies the SU(∞) Toda equation. When the supergravity decouples, the metric is hyper-Kähler. We propose the mechanism that gravitationally dress any (D-instanton) hyper-Kähler metric to the (universal hypermultiplet) quaternionic metric of the same dimension.

Original language | English |
---|---|

Pages (from-to) | 262-267 |

Number of pages | 6 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 504 |

Issue number | 3 |

DOIs | |

Publication status | Published - 12 Apr 2001 |

### Fingerprint

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

**Gravitational dressing of D-instantons.** / Ketov, Sergei V.

Research output: Contribution to journal › Article

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*, vol. 504, no. 3, pp. 262-267. https://doi.org/10.1016/S0370-2693(01)00304-5

}

TY - JOUR

T1 - Gravitational dressing of D-instantons

AU - Ketov, Sergei V.

PY - 2001/4/12

Y1 - 2001/4/12

N2 - The non-perturbative corrections to the universal hypermultiplet moduli space metric in the type-IIA superstring compactification on a Calabi - Yau threefold are investigated in the presence of 4d, N = 2 supergravity. These corrections come from multiple wrapping of the BPS (Euclidean) D2-branes around certain (BPS) Calabi - Yau 3-cycles, and they are known as the D-instantons. The exact universal hypermultiplet metric is governed by a quaternionic potential that satisfies the SU(∞) Toda equation. When the supergravity decouples, the metric is hyper-Kähler. We propose the mechanism that gravitationally dress any (D-instanton) hyper-Kähler metric to the (universal hypermultiplet) quaternionic metric of the same dimension.

AB - The non-perturbative corrections to the universal hypermultiplet moduli space metric in the type-IIA superstring compactification on a Calabi - Yau threefold are investigated in the presence of 4d, N = 2 supergravity. These corrections come from multiple wrapping of the BPS (Euclidean) D2-branes around certain (BPS) Calabi - Yau 3-cycles, and they are known as the D-instantons. The exact universal hypermultiplet metric is governed by a quaternionic potential that satisfies the SU(∞) Toda equation. When the supergravity decouples, the metric is hyper-Kähler. We propose the mechanism that gravitationally dress any (D-instanton) hyper-Kähler metric to the (universal hypermultiplet) quaternionic metric of the same dimension.

UR - http://www.scopus.com/inward/record.url?scp=0035848942&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035848942&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(01)00304-5

DO - 10.1016/S0370-2693(01)00304-5

M3 - Article

AN - SCOPUS:0035848942

VL - 504

SP - 262

EP - 267

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 3

ER -