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Abstract
We present a global analysis of the Higgs and electroweak sector based on LHC Run II and electroweak precision observables. We show which measurements provide the leading constraints on Higgs-related operators, and how the achieved LHC precision makes it necessary to combine rate measurements with electroweak precision observables. The SFitter framework allows us to include kinematic distributions beyond pre-defined ATLAS and CMS observables, independently study correlations, and avoid Gaussian assumptions for theory uncertainties. These Run II results are a step towards a precision physics program at the LHC, interpreted in terms of effective operators.
Highlights
7 SummaryA Constraints on fermionic operators from EWPD and the LHC
We have presented a global analysis of the LHC Run I and Run II measurements related to Higgs and di-boson measurements in the framework of an effective Lagrangian to dimension six
We demonstrate the impact of LHC observables on the operators in Eq(10) in Fig. 9, where we compare the limits resulting from a fit of EWPD only with a combined fit of EWPD with LHC Run I+II observables
Summary
W W → + − + E/T (0 j) W W → + ( )− + E/T (0 j) W Z → + − ( )± W Z → + − ( )± + E/T. One caveat applies to all analyses based on effective Lagrangians: we consider the dimension-6 Lagrangian of Eq(3) and Eq(10) the appropriate description of the physics effects beyond the Standard Model. The observation of a sign switch for example in a Yukawa coupling as part of a global analysis would signal a breakdown of the renormalizable Standard Model and its symmetry structure and would prompt us to modify our SMEFT hypothesis. When it comes to searching for effects in kinematic distributions, these two search strategies are closely related, for example when we directly search for mass peaks in the same distributions that we indirectly f/Λ2 95% CL [TeV-2]. We observe a strong correlation of the invisible branching dΣ dmZH SM
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