Higgs as a BSM probe

Marzocca, D. (2016) Higgs as a BSM probe. Il nuovo cimento C, 39 (4). pp. 1-7. ISSN 1826-9885

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One of the most important ways to explore BSM at the LCH Run-2 is to study the properties of the Higgs boson. In order to do so in a consistent and model-independent framework, we introduce a set of pseudo-observables (PO), defined from on-shell amplitudes, characterising the properties of Higgs production and decay processes in generic extensions of the Standard Model with no new particles below the Higgs mass. These PO provide a generalisation of the κ-framework used by the LHC experiments and allow for the systematic inclusion of higher-order QED corrections. Symmetries of the new-physics sector, such as CP invariance and fermion universality imply relations among the PO, that could be tested directly from Higgs data. The further assumption that the Higgs is part of an electroweak doublet allows for the introduction of the linear effective field theory (SMEFT) to describe the effect of new physics at low energy. In this context, PO can be matched to the Wilson coefficients of the SMEFT, providing a way to test experimentally the SMEFT predictions by combining Higgs data with other electroweak processes.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 16 Nov 2020 20:08
Last Modified: 16 Nov 2020 20:08
URI: http://eprints.bice.rm.cnr.it/id/eprint/19593

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