Positivity vs. Lorentz-violation: an explicit example
High Energy Physics - Theory
2021-11-03 v2 General Relativity and Quantum Cosmology
Abstract
We show how a class of multi-field scalar-field theories in a Lorentz-breaking background imposes consistency conditions on its effective theory of a single field and provides an example of order-unity violation of a naively applied positivity bound, assuming a large hierarchy between the masses of the lightest field and the others.
Keywords
Cite
@article{arxiv.2107.01755,
title = {Positivity vs. Lorentz-violation: an explicit example},
author = {Katsuki Aoki and Shinji Mukohyama and Ryo Namba},
journal= {arXiv preprint arXiv:2107.01755},
year = {2021}
}
Comments
50 pages, 3 figures, 1 table, v2: improved explanations, new section VF added, references added, to appear in JCAP