Super potentials from stringy instantons without orientifolds
Artikel i vetenskaplig tidskrift, 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

Författare

Christoffer Petersson

Chalmers, Teknisk fysik, Matematisk fysik

Journal of High Energy Physics

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

5 19-

Ämneskategorier

Matematik

Fysik