α -attractors from supersymmetry breaking
Aldabergenov Y. Chatrabhuti A. Isono H.
February 2021Springer Science and Business Media Deutschland GmbH
European Physical Journal C
2021#81Issue 2
We construct new models of inflation and spontaneous supersymmetry breaking in de Sitter vacuum, with a single chiral superfield, where inflaton is the superpartner of the goldstino. Our approach is based on hyperbolic Kähler geometry, and a gauged (non-axionic) U(1) R symmetry rotating the chiral scalar field by a phase. The U(1) R gauge field combines with the angular component of the chiral scalar to form a massive vector, and single-field inflation is driven by the radial part of the scalar. We find that in a certain parameter range they can be approximated by simplest Starobinsky-like (E-model) α-attractors, thus predicting ns and r within 1 σ CMB constraints. Supersymmetry (and R-symmetry) is broken at a high scale with the gravitino mass m3 / 2≳ 10 14 GeV, and the fermionic sector also includes a heavy spin-1/2 field. In all the considered cases the inflaton is the lightest field of the model.
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Department of Physics, Faculty of Science, Chulalongkorn University, Thanon Phayathai, Pathumwan, Bangkok, 10330, Thailand
Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty, 050040, Kazakhstan
Department of Physics
Institute of Experimental and Theoretical Physics
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