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Super potentials from stringy instantons without orientifolds

Christoffer Petersson (Institutionen för fundamental fysik, Matematisk fysik)
Journal of High Energy Physics (1126-6708). 5, p. 19. (2008)
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: nonperturbative effects, brane dynamics in gauge theories, D-branes, YANG-MILLS THEORIES, GAUGE-THEORIES, SUPERSYMMETRIC QCD, NONCOMMUTATIVE, R-4, D-BRANES, SUPERPOTENTIALS, CALCULUS, BREAKING, FLUXES, MODELS



Denna post skapades 2009-10-20.
CPL Pubid: 100329

 

Institutioner (Chalmers)

Institutionen för fundamental fysik, Matematisk fysik (2005-2013)

Ämnesområden

Matematik
Fysik

Chalmers infrastruktur

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