Super potentials from stringy instantons without orientifolds

Christoffer Petersson

Super potentials from stringy instantons without orientifolds
Journal article, 2008

In this paper we show that it is possible to derive non-perturbative superpotential terms from a stringy instanton without introducing orientifold planes. The instanton is realized by a Euclidean D brane wrapping a non-trivial cycle upon which we also wrap a single space-filling D brane. The standard problem of unwanted neutral fermionic zero modes is evaded by the appearance of couplings to charged bosonic zero modes in the instanton moduli action. Since the Euclidean D brane wraps a cycle which is not associated to any low energy gauge dynamics, it can not be interpreted as an ordinary gauge instanton, but rather as a stringy one. By considering such a brane configuration at an orbifold singularity, we can explicitly evaluate the instanton moduli space integral and find a holomorphic superpotential term with the structure of a baryonic mass term.

CALCULUS

NONCOMMUTATIVE

SUPERSYMMETRIC QCD

brane dynamics in gauge theories

R-4

D-BRANES

YANG-MILLS THEORIES

GAUGE-THEORIES

nonperturbative effects

SUPERPOTENTIALS

BREAKING

FLUXES

MODELS

D-branes

Author

Christoffer Petersson

Chalmers, Applied Physics, Mathematical Physics

Other publications Research

Journal of High Energy Physics

1126-6708 (ISSN) 1029-8479 (eISSN)

5 19-

Subject Categories

Mathematics

Physical Sciences

More information

Created

10/6/2017