Browsing by Author "Morales, Jose F."

Now showing 1 - 2 of 2
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    Brane world effective actions for D-branes with fluxes
    (2005) Bertolini, Matteo; Billó, Marco; Lerda, Alberto; Morales, Jose F.; Russo, Rodolfo; Physics; Elementary Particle Theory
    We develop systematic string techniques to study brane world effective actions for models with magnetized (or equivalently intersecting) D-branes. In particular, we derive the dependence on all NS-NS moduli of the kinetic terms of the chiral matter in a generic non-supersymmetric brane configurations with non-commuting open string fluxes. Near a N=1 supersymmetric point the effective action is consistent with a Fayet-Iliopoulos supersymmetry breaking and the normalization of the scalar kinetic terms is nothing else than the Kahler metric. We also discuss, from a stringy perspective, D and F term breaking mechanisms, and how, in this generic set up, the Kahler metric enters in the physical Yukawa couplings.
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    N=1 superpotentials from multi-instanton calculus
    (2005) Fucito, Francesco; Morales, Jose F.; Poghossian, Rubik; Tanzini, Alessandro; Mathematics; Mathematical Physics
    In this paper we compute gaugino and scalar condensates in N = 1 supersymmetric gauge theories with and without massive adjoint matter, using localization formulae over the multi-instanton moduli space. Furthermore we compute the chiral ring relations among the correlators of the N = 1* theory and check this result against the multi-instanton computation finding agreement.