Low-scale SUSY breaking and the (s)goldstino physics
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Publication:1950558
DOI10.1016/J.NUCLPHYSB.2013.01.015zbMATH Open1262.81153arXiv1210.8336OpenAlexW2066933243MaRDI QIDQ1950558
Author name not available (Why is that?)
Publication date: 13 May 2013
Published in: (Search for Journal in Brave)
Abstract: For a 4D N=1 supersymmetric model with a low SUSY breaking scale (f) and general Kahler potential K(Phi^i,Phi_j^*) and superpotential W(Phi^i) we study, in an effective theory approach, the relation of the goldstino superfield to the (Ferrara-Zumino) superconformal symmetry breaking chiral superfield X. In the presence of more sources of supersymmetry breaking, we verify the conjecture that the goldstino superfield is the (infrared) limit of X for zero-momentum and Lambda->infty. (Lambda is the effective cut-off scale). We then study the constraint X^2=0, which in the one-field case is known to decouple a massive sgoldstino and thus provide an effective superfield description of the Akulov-Volkov action for the goldstino. In the presence of additional fields that contribute to SUSY breaking we identify conditions for which X^2=0 remains valid, in the effective theory below a large but finite sgoldstino mass. The conditions ensure that the effective expansion (in 1/Lambda) of the initial Lagrangian is not in conflict with the decoupling limit of the sgoldstino (1/m_sgoldstinosim Lambda/f, f<Lambda^2).
Full work available at URL: https://arxiv.org/abs/1210.8336
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