2010/06/16 by Roberto Auzzi, Eliezer Rabinovici
Physics and Astronomy · #Black Holes and Theoretical Physics #Gauge group #Gauge theory #Gaugino #Metastability #Moduli #Moduli space #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superpotential #Supersymmetry breaking #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep08(2010)044
published as JHEP 1008:044,2010 · 27 pages, 16 figures; v2: some typos corrected
arxiv created 2010/06/16 · openalex publication_date 2010/08/01 · arxiv updated 2014/11/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study supersymmetry breaking in metastable vacua on the Coulomb branch of perturbed N=2 gauge theories, with gauge group SU(2) and different matter content (Nf=0,2,4). The theory is deformed with a superpotential which is a cubic polynomial in u=Tr Φ2, where Φis the adjoint superfield. The allowed region of the perturbation parameters in this N=1 theory is plotted as a function of the moduli space coordinate. In the asymptotically free cases a significant fine-tuning in the perturbation parameters is needed to achieve metastable vacua in the weakly coupled region of the moduli space; a lower degree of fine-tuning is required in the strongly coupled regime. In the conformal case (Nf=4 fundamentals) we find that also an explicit mass for the hypermultiplets must be introduced in order to generate metastable vacua. In the case of Nf=2 fundamentals it is possible to achieve a metastable vacuum also in the neighborhood of the Argyres-Douglas fixed point (even if a large degree of fine-tuning is needed in this limit). Direct gauge mediation is discussed; gaugino masses of the same order of the SUSY-breaking can be obtained.