Model-independent Higgs coupling measurements at the LHC using the H \to ZZ \to 4l lineshape

Details Model-independent Higgs coupling measurements at the LHC using the H \to ZZ \to 4l lineshape Model-independent Higgs coupling measurements at the LHC using the H \to ZZ \to 4l lineshape

2011-07-21

arxiv.org/abs/1107.4342v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 4 figures

Scientific paper

We show that combining a direct measurement of the Higgs total width from the H \to ZZ \to 4l lineshape with Higgs signal rate measurements allows Higgs couplings to be extracted in a model-independent way from CERN Large Hadron Collider (LHC) data. Using existing experimental studies with 30 fb-1 at one detector of the 14 TeV LHC, we show that the couplings-squared of a 190 GeV Higgs to WW, ZZ, and gg can be extracted with statistical precisions of about 10%, and a 95% confidence level upper limit on an unobserved component of the Higgs decay width of about 22% of the SM Higgs width can be set. The method can also be applied for heavier Higgs masses.

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