National Natural Science Foundation of China [12135006, 12075097, 11947213, 11675061, 11775092]; Fundamental Research Funds for the Central Universities [CCNU20TS007, CCNU19TD012, CCNU22LJ004]; International Postdoctoral Exchange Fellowship Program
机构署名:
本校为第一机构
院系归属:
物理科学与技术学院
摘要:
AbstractWe update the Standard Model (SM) predictions for the branching ratios of the rare top-quark decays $$t \rightarrow cg(g)$$
t
→
c
g
(
g
)
, and evaluate the maximum rates that can be reached in the aligned as well as in the four conventional two-Higgs-doublet models (2HDMs) with $$\mathcal {Z}_2$$
Z
2
symmetries. Taking into account the relevant constraints on the model parameters resulting from a global fit obtained at the $$95.5\%$$
95.5
%
confidence level, we find that the branching ratios of $$t \rightarro...