Same-sign WW Scattering in the HEFT: Discoverability vs. EFT Validity

Abstract

Vector boson scatterings are fundamental processes to shed light on the nature of the electroweak symmetry breaking mechanism. Deviations from the Standard Model predictions on the corresponding observables can be interpreted in terms of effective field theories, that however undergo consistency conditions. In this paper, the same-sign W W scattering is considered within the HEFT context and the correct usage of the effective field theory approach is discussed. Regions of the parameters space are identified where a signal of new physics could be measured at HL-LHC with a significance of more than 5$\sigma$ and the effective field theory description is consistently adopted. These results are then translated into bounds on the $\xi$ parameter in the composite Higgs scenario. The discussion on the agreement with previous literature and the comparison with the equivalent analysis in the SMEFT case are also included.

26 pages, 8 figures. V2 matches the journal version with a few references added

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Cited by in corpus (14)

• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• Unitarity Constraints on Anomalous Quartic Couplings
• SMEFT analysis of vector boson scattering and diboson data from the LHC Run II
• The flair of Higgsflare: Distinguishing electroweak EFTs with $W_L{W}_L\to n\times h$
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• Measuring the anomalous quartic gauge couplings in the $W^{+}{W}^{-}\to W^{+}{W}^{-}$ process at muon collider using artificial neural networks
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• Probing Effective Field Theory Approach in the CP Violating Minimal Linear $\sigma$ Model