Nonstandard Higgs Couplings from Angular Distributions in $h\to Z \ell^+\ell^-$

Understand

We compute the fully differential rate for the Higgs-boson decay $h\to Z\ell^+\ell^-$, with $Z\to\ell^{'+}\ell^{'-}$.

• For these processes we assume the most general matrix elements within an effective Lagrangian framework.
• The electroweak chiral Lagrangian we employ assumes minimal particle content and Standard Model gauge symmetries, but is otherwise completely general.
• We discuss how information on new physics in the decay form factors may be obtained that is inaccessible in the dilepton-mass spectrum integrated over angular variables.