4 papers · 1 filter
S-matrix bootstrap bounds on self-interacting dark matter
Qing Chen, Zhuo-Hui Wang, Shuang-Yong Zhou
Self-interacting dark matter turns the structure of galactic halos into a direct requirement on a low-energy scattering amplitude. We show that, for weakly coupled scalar dark matt…
Effective Theory for Light Portal Dark Matter Detection
Qing Chen, Shuang-Yong Zhou
We develop a general framework for the computation of light portal dark matter direct detection, incorporating a consistent treatment of finite momentum transfer. In this framework…
Bi-gravity Portal Dark Matter
Qing Chen, Shuang-Yong Zhou
We consider a model where the interaction between dark matter and the Standard Model particles are mediated by a ghost-free bi-gravity portal. The bi-gravity model invokes a massiv…
Capping the positivity cone: dimension-8 Higgs operators in the SMEFT
Qing Chen, Ken Mimasu, Tong Arthur Wu +2
SMEFT Wilson coefficients are subject to various positivity bounds in order to be consistent with the fundamental principles of S-matrix. Previous bounds on dimension-8 SMEFT opera…