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Ghost Condensation and a Consistent Infrared Modification of Gravity
Nima Arkani-Hamed, Hsin-Chia Cheng, Markus A. Luty +1
We propose a theoretically consistent modification of gravity in the infrared, which is compatible with all current experimental observations. This is an analog of Higgs mechanism…
TeV Symmetry and the Little Hierarchy Problem
Hsin-Chia Cheng, Ian Low
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 st…
Pseudonatural Inflation
Nima Arkani-Hamed, Hsin-Chia Cheng, Paolo Creminelli +1
We study how to obtain a sufficiently flat inflaton potential that is natural from the particle physics point of view. Supersymmetry, which is broken during inflation, cannot prote…
Extranatural Inflation
Nima Arkani-Hamed, Hsin-Chia Cheng, Paolo Creminelli +1
We present a new model of inflation in which the inflaton is the extra component of a gauge field in a 5d theory compactified on a circle. The chief merit of this model is that the…