Topic
Naturalness
About: Naturalness is a research topic. Over the lifetime, 1305 publications have been published within this topic receiving 31737 citations.
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TL;DR: In this paper, the analysis by Friar, Madland, and Lynn of naturalness in a relativistic point-coupling model is extended to experimental nuclear data.
74 citations
TL;DR: In this paper, the authors provide a systematic effective lagrangian description of the phenomenology of the lightest top-partners in composite Higgs models, based on symmetry, on selection rules and on plausible dynamical assumptions.
Abstract: We provide a systematic effective lagrangian description of the phenomenology of the lightest top-partners in composite Higgs models. Our construction is based on symmetry, on selection rules and on plausible dynamical assumptions. The structure of the resulting simplified models depends on the quantum numbers of the lightest top partner and of the operators involved in the generation of the top Yukawa. In all cases the phenomenology is conveniently described by a small number of parameters, and the results of experimental searches are readily interpreted as a test of naturalness. We recast presently available experimental bounds on heavy fermions into bounds on top partners: LHC has already stepped well inside the natural region of parameter space.
74 citations
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18 Aug 2000
TL;DR: In this article, conditions for the naturalness of cosmological quintessence scenarios are formulated for a cosmologous cosmology, where the quintessense lagrangian is taken to be the sum of a simple exponential potential and a non-canonical kinetic term.
Abstract: We formulate conditions for the naturalness of cosmological quintessence scenarios The quintessence lagrangian is taken to be the sum of a simple exponential potential and a non-canonical kinetic term This parameterization covers most variants of quintessence and makes the naturalness conditions particularly transparent Several ``natural'' scalar models lead, for the present cosmological era, to a large fraction of homogeneous dark energy density and an acceleration of the scale factor as suggested by observation
72 citations
TL;DR: The T-parity symmetry for new particles at the TeV scale was introduced in this paper to solve the little hierarchy problem and stabilize the electroweak scale up to 10 TeV.
Abstract: Constraints from precision electroweak measurements reveal no evidence for new physics up to 5 - 7 TeV, whereas naturalness requires new particles at around 1 TeV to address the stability of the electroweak scale. We show that this "little hierarchy problem" can be cured by introducing a symmetry for new particles at the TeV scale. As an example, we construct a little Higgs model with this new symmetry, dubbed T-parity, which naturally solves the little hierarchy problem and, at the same time, stabilize the electroweak scale up to 10 TeV. The model has many important phenomenological consequences, including consistency with the precision data without any fine-tuning, a stable weakly-interacting particle as the dark matter candidate, as well as collider signals completely different from existing little Higgs models, but rather similar to the supersymmetric theories with conserved R-parity.
72 citations
TL;DR: The Relative Quantitative Reference Approach for Naturalness Assessments (RANA) as discussed by the authors is a method for overcoming the lack of virgin forests using a surrogate reference for forested landscapes.
71 citations