COMETA workshop on EFT in HH and VBS

Session

Early career scientists presentations

17 Mar 2025, 17:00

Paris

Conveners

Early career scientists presentations

• Alejo Nahuel Rossia (University of Padua and INFN Sezione di Padova)

Early career scientists presentations

• There are no conveners in this block

18. A novel implementation of the Matrix Element Method at next-to-leading-order (NLO) for the measurement of the Higgs tri-linear coupling in di-Higgs production at the LHC (20+10)

Matthias Jean Tartarin (Laboratoire des 2 Infinis - Toulouse, CNRS / Univ. Paul Sabatier (FR))

17/03/2025, 17:00

One of the LHC's priorities, following the discovery of the Higgs boson, is to observe the production of Higgs pairs and to measure the Higgs tri-linear coupling $\lambda_{3H}$.
Due to the rarity of di-Higgs production, measuring $\lambda_{3H}$ has proven to be highly challenging. Exclusion limits have been observed using a variety of approaches, including cut-based methods and boosted...

14. HEFT Multi-Higgs Production in VBF (20+10)

Javier Martínez Martín (Universidad Complutense de Madrid & IPARCOS)

17/03/2025, 17:30

We have studied the production of 2, 3 and 4 Higgs bosons from the collision of Goldstone bosons using the equivalence theorem in HEFT. This work has been compared with results from both ATLAS and CMS. The measurements are being updated by the collaborations with the latest results.

28. Electroweak WZ production measurement and an EFT interpretation with the ATLAS detector at 𝟏𝟑 𝑻𝒆𝑽 (20+10)

Dr Eirini Kasimi (Aristotle University of Thessaloniki (GR))

18/03/2025, 16:00

Vector Boson Scattering in the WZ fully leptonic channel was studied in ATLAS with the full Run 2 data of 140 fb-1 and the results were published recently. The importance of the channel for the study of the Electroweak Symmetry Breaking and for indirect New Physics searches beyond the Standard Model will be presented. The results of the cross section measurements will be discussed and the...

15. Double Higgs Production in Vector Boson Fusion at NLO QCD in HEFT

Jens Braun (Karlsruhe Institute of Technology (KIT))

18/03/2025, 16:30

We present a calculation of the NLO QCD corrections to Higgs boson pair production in vector boson fusion, combined with the leading operators parametrising anomalous interactions in non-linear Effective Field Theory (HEFT). Based on our Monte Carlo implementation using GoSam+Whizard, we investigate the effects of anomalous Higgs couplings on various observables.

29. Exploring multiple Higgs production at colliders with HEFT

Daniel Domenech Moya (Universidad Autónoma de Madrid (ES)))

18/03/2025, 17:00

We have explored the effects of different HEFT coefficients to the multiple Higgs production via VBF at various colliders, studying their potential accessibility. We have also matched the bosonic HEFT to the 2HDM and the SMEFT in VBF processes.

13. VBS measurement in semileptonic final states with ATLAS Run-2 data (20+10)

Mathieu Markovitch (Université Paris-Saclay (FR))

Vector boson scattering (VBS) processes probe the fundamental structure of electroweak (EW) interactions and provide a high sensitivity to new physics phenomena affecting gauge and Higgs couplings. The semileptonic final states, where one of the scattered electroweak boson decays hadronically into a quark/antiquark pair and the other boson decays leptonically into electrons, muons or...