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hep-ph2023
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…
hep-ph2023
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…