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

Abstract

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

Comments: 24 pages, 37 figures, version including changes suggested by the Physical Review D publication team