Higgs form factors in associated production

摘要

A bstract We further develop a form factor formalism characterizing anomalous interactions of the Higgs-like boson ( h ) to massive electroweak vector bosons ( V ) and generic bilinear fermion states $ left( mathcal{F} ight) $ . Employing this approach, we examine the sensitivity of pp → $ mathcal{F} $ → V h associated production to physics beyond the Standard Model, and compare it to the corresponding sensitivity of h ?→? V $ mathcal{F} $ decays. We discuss how determining the Vh invariant-mass distribution in associated production at LHC is a key ingredient for model-independent determinations of hV $ mathcal{F} $ interactions. We also provide a general discussion about the power counting of the form factor’s momentum dependence in a generic effective field theory approach, analyzing in particular how effective theories based on a linear and non-linear realization of the SU(2)~(L)? × ?U(1)~(Y)gauge symmetry map into the form factor formalism. We point out how measurements of the differential spectra characterizing h ?→? V $ mathcal{F} $ decays and pp → $ mathcal{F} $ → Vh associated production could be the leading indication of the presence of a nonlinear realization of the SU(2)~(L)? × ?U(1)~(Y)gauge symmetry.