Ghostbusters in f (R) supergravity
نویسندگان
چکیده
منابع مشابه
F-flatness and universality in broken Supergravity
We show that in a broken supergravity theory any field that acquires a vacuum expectation value obtains at the same time an F-term of order 〈θ〉m3/2. These F-terms contribute unsuppressed to the trilinear couplings and have observable effects in the low energy phenomenology. We show that μ → eγ decays can receive large contributions from this source at the level of current experimental bounds. T...
متن کاملR 4 terms and d = 4 supergravity
We start by a concise yet thorough revision of four-dimensional super-space supergravity. We present curved superspace geometry, for arbitrary N , including torsion, curvature and Bianchi identities. We motivate the choice of torsion constraints. We then consider the particular cases of N = 1, 2. In both cases we show how Poincaré supergravity can be obtained from conformal supergravity. We see...
متن کاملSupersymmetry Breaking with Vanishing F -terms in Supergravity Theories
In conventional supergravity theories, supersymmetry is broken by a non-zero F -term, and the cosmological constant is fine tuned to zero by a constant in the superpotential W . We discuss a class of supergravity theories with vanishing F -terms but 〈W 〉 6 = 0 being generated dynamically. The cosmological constant is assumed to be cancelled by a non-zero D-term. In this scenario the gravity-med...
متن کاملF - term Hybrid Inflation in Effective Supergravity Theories
We show that the effective low energy supergravity theories which result from a generic string theory can provide a promising framework for models of hybrid inflation in which the potential energy which drives inflation originates from the F-term of the effective supergravity theory. In the class of models considered the inflaton is protected from receiving mass during inflation by a Heisenberg...
متن کاملf(R) Theories
Over the past decade, f(R) theories have been extensively studied as one of the simplest modifications to General Relativity. In this article we review various applications of f(R) theories to cosmology and gravity - such as inflation, dark energy, local gravity constraints, cosmological perturbations, and spherically symmetric solutions in weak and strong gravitational backgrounds. We present ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2018
ISSN: 1029-8479
DOI: 10.1007/jhep05(2018)102