Signature of the 2HDM at Higgs factories
نویسندگان
چکیده
The full one-loop corrections, both the weak and QED to process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}Z\ensuremath{\phi}$ ($\ensuremath{\phi}={h}^{0},{H}^{0}$) in two-Higgs-doublet model (2HDM) at Higgs factories are presented. Up $O({\ensuremath{\alpha}}_{\mathrm{em}})$ level, virtual corrections evaluated by using feynarts/formcalc packages. real emission computed Feynman Diagram Calculation (FDC) package, collinear divergences regularized electron structure functions. Using FDC packages, we study Standard Model (SM) 2HDM, respectively. Gauge dependence arising renormalization of mixing angels is removed pinch technique. After taking into account experimental constraints from current LHC data, propose four interesting benchmark scenarios for future colliders. By these scenarios, evaluate deviation $\mathrm{\ensuremath{\Delta}}\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}Z\ensuremath{\phi})$ their SM values. We also examine boson decays $\ensuremath{\phi}\ensuremath{\rightarrow}b\overline{b}$ $\ensuremath{\phi}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}{\ensuremath{\tau}}^{\ensuremath{-}}$, which can have large electroweak (EW) contributions triple couplings absent SM. It found that EW sizeable could be measured ${e}^{+}{e}^{\ensuremath{-}}$ colliders such as ILC, CLIC, CEPC.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.103.095030