Positivity vs. Lorentz-violation: an explicit example
Positivity vs. Lorentz-violation: an explicit example
复制标题
DOI:
10.1088/1475-7516/2021/10/079
复制
发表时间:
2021-07
影响因子:
6.4
通讯作者:
K. Aoki;S. Mukohyama;R. Namba
中科院分区:
文献类型:
--
作者:
K. Aoki;S. Mukohyama;R. Namba
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.