A new gauge mediation theory

I. Antoniadis, K. Benakli, Antonio Delgado, M. Quirós

Research output: Contribution to journalArticleResearchpeer-review

53 Citations (Scopus)


We propose a class of models with gauge mediation of supersymmetry breaking, inspired by simple brane constructions, where R-symmetry is very weakly broken. The gauge sector has an extended N = 2 supersymmetry and the two electroweak Higgses form an N = 2 hyper-multiplet, while quarks and leptons remain in N = 1 chiral multiplets. Supersymmetry is broken via the D-term expectation value of a secluded U(1) and it is transmitted to the Standard Model via gauge interactions of messengers in N = 2 hypermultiplets: gauginos thus receive Dirac masses. The model has several distinct experimental signatures with respect to ordinary models of gauge or gravity mediation realizations of the Minimal Supersymmetric Standard Model (MSSM). First, it predicts extra states as a third chargino that can be observed at collider experiments. Second, the absence of a D-flat direction in the Higgs sector implies a lightest Higgs behaving exactly as the Standard Model one and thus a reduction of the 'little' fine-tuning in the low tan β region. This breaking of supersymmetry can be easily implemented in string theory models.
Original languageEnglish
Pages (from-to)645-672
JournalAdvanced Studies in Theoretical Physics
Issue number14
Publication statusPublished - 28 Oct 2008


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