Speaker
Description
We construct differential observables that can probe effective field theory (EFT) effects in the Higgstrahlung process, $pp \to Z(ll)\,h$, to all orders in the EFT expansion. To achieve this, we first derive a mapping between the partial wave expansion and the EFT expansion to all orders. We find that at lower orders, EFT predicts correlations between the different helicity amplitudes. This allows us to construct linear combinations of helicity amplitudes that get their leading contribution from a higher dimension EFT operator. We then introduce experimental observables, the so called angular moments $-$ that probe these helicity amplitude combinations $-$ and can be determined from a fully differential analysis of the angular distribution of the leptons arising from the $Z$ decay. We show that analyzing the dependence of these angular moments on the $Zh$ invariant mass and the 2-to-2 scattering angle, allows us to systematically probe all higher dimension EFT operators contributing to this process. While we take $pp \to Z(ll)\,h$ as an example, the methods developed here are completely general and can be applied to all the standard electroweak processes.
| Will this talk be in person or remote? | Unsure |
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| (Optional) If remote, what will be the difference in hours between your local time and the time at CERN (CET)? | 3.5 |