Higgs boson form factor effects in $t\bar t$ production by $W^-W^+$ and $ZZ$ fusion

摘要: We study the fusion processes $W^-W^+\to t\bar t$ and $ZZ\to observable at a future $e^-e^+$ collider we discuss their sensitivity to an $Htt$ form factor which may be due compositeness, in particular when $H$ top quark have common constituents. make amplitude analysis illustrate helicity amplitudes cross sections for specific final $t\bar polarizations are especially sensitive this factor.