Abstract

The electroweak symmetry breaking (EWSB) mechanism of the Standard Model (SM) predicts an elementary spin-0 neutral Higgs boson1 with tree-level couplings L =1/v [2M W 2 HW + W -+ M Z 2 HZZ - m f f f] where v = (√2G F )-1/2 = 246 GeV is the vacuum expectation value of the neutral member of the scalar doublet. The HWW and HZZ couplings are tied to the verified M w and M z predictions and thus offer the most critical tests of the EWSB mechanism—the Yukawa couplings of the Higgs boson to quarks are not as directly related to the observed symmetry breaking.

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