Precision Electroweak Analysis after the Higgs Boson Discovery

Abstract

Until recently precision electroweak computations were fundamentally uncertain due to lack of knowledge about the existence of the Standard Model Higgs boson and its mass. For this reason substantial calculational machinery had to be carried along for each calculation that changed the Higgs boson mass and other parameters of the Standard Model. Now that the Higgs boson is discovered and its mass is known to within a percent, we are able to compute reliable semi-analytic expansions of electroweak observables. We present results of those computations in the form of expansion formulae. In addition to the convenience of having these expressions, we show how the approach makes investigating new physics contributions to precision electroweak observables much easier.

23 pages, 8 tables. v2: a mistake corrected. v3: typos corrected

References in corpus (4)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Measurement of sin^2θ_{eff}^{lept} and Z-light quark couplings using the forward-backward charge asymmetry in p\bar{p} -> Z/γ^{*} -> e^{+}e^{-} events with L=5.0 fb^{-1} at \sqrt{s}=1.96 TeV

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• Disentangling SMEFT operators with future low-energy PVES experiments
• Probing the $Zb\bar{b}$ anomalous couplings via exclusive $Z$ boson decay
• Constraining the gauge and scalar sectors of the doublet left-right symmetric model
• Setting limits on Effective Field Theories: the case of Dark Matter
• The role of low-energy observables in precision Higgs analysis
• Four-lepton Z-boson decay constraints on the SMEFT
• Constraining dimension-6 SMEFT with higher-order predictions for $pp\to tW$
• Dilepton production in the SMEFT at $\mathcal{O}(1/{\Lambda }^4)$