D-brane instantons on the T6/Bbb Z3 orientifold

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Published 12 July 2007 • Published under licence by IOP Publishing Ltd
, , Citation Massimo Bianchi et al JHEP07(2007)038 DOI 10.1088/1126-6708/2007/07/038

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Author affiliations

1 Dipartimento di Fisica, Università di Roma ``Tor Vergata'', and I.N.F.N. Sezione di Roma II, Via della Ricerca Scientifica, 00133 Roma, Italy

Dates

  1. Received 4 June 2007
  2. Accepted 28 June 2007
  3. Published

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1126-6708/2007/07/038

Abstract

We give a detailed microscopic derivation of gauge and stringy instanton generated superpotentials for gauge theories living on D3-branes at Bbb Z3-orientifold singularities. Gauge instantons are generated by D(-1)-branes and lead to Affleck, Dine and Seiberg (ADS) like superpotentials in the effective Script N = 1 gauge theories with three generations of bifundamental and anti/symmetric matter. Stringy instanton effects are generated by Euclidean ED3-branes wrapping four-cycles on T6/Bbb Z3. They give rise to Majorana masses, Yukawa couplings or non-renormalizable superpotentials depending on the gauge theory. Finally we determine the conditions under which ADS like superpotentials are generated in Script N = 1 gauge theories with adjoints, fundamentals, symmetric and antisymmetric chiral matter.

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10.1088/1126-6708/2007/07/038