2014/11/30 by Renata Kallosh, Andrei Linde, Marco Scalisi · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmological constant #Cosmological constant problem #Cosmology and Gravitation Theories #Dark energy #De Sitter universe #Fermion #Inflation (cosmology) #Nilpotent #Particle physics theoretical and experimental studies #Supergravity #Supersymmetry #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep03(2015)111
published as JHEP1503(2015)111 · 19 pages, comments on supersymmetry breaking are added
arxiv created 2015/01/05 · openalex publication_date 2015/03/01 · arxiv updated 2015/03/31 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We continue developing cosmological models involving nilpotent chiral super-fields, which provide a simple unified description of inflation and the current acceleration of the universe in the supergravity context. We describe here a general class of models with a positive cosmological constant at the minimum of the potential, such that supersymmetry is spontaneously broken in the direction of the nilpotent superfield S. In the unitary gauge, these models have a simple action where all highly non-linear fermionic terms of the classical Volkov-Akulov action disappear. We present masses for bosons and fermions in these theories. By a proper choice of parameters in this class of models, one can fit any possible set of the inflationary parameters n s and r, a broad range of values of the vacuum energy V 0, which plays the role of the dark energy, and achieve a controllable level of supersymmetry breaking. This can be done without introducing light moduli, such as Polonyi fields, which often lead to cosmological problems in phenomenological supergravity.