Abstract
Combined measurements of the production and decay rates of the Higgs boson, as well as its couplings to vector bosons and fermions, are presented. The analysis uses the LHC proton–proton collision data set recorded with the CMS detector in 2016 at sqrt{s}=13,text {Te}text {V} , corresponding to an integrated luminosity of 35.9{,text {fb}^{-1}} . The combination is based on analyses targeting the five main Higgs boson production mechanisms (gluon fusion, vector boson fusion, and associated production with a mathrm {W} or mathrm {Z} boson, or a top quark-antiquark pair) and the following decay modes: mathrm {H} rightarrow gamma gamma , mathrm {Z}mathrm {Z}, mathrm {W}mathrm {W}, mathrm {tau }mathrm {tau }, mathrm {b} mathrm {b} , and mathrm {mu }mathrm {mu }. Searches for invisible Higgs boson decays are also considered. The best-fit ratio of the signal yield to the standard model expectation is measured to be mu =1.17pm 0.10, assuming a Higgs boson mass of 125.09,text {Ge}text {V} . Additional results are given for various assumptions on the scaling behavior of the production and decay modes, including generic parametrizations based on ratios of cross sections and branching fractions or couplings. The results are compatible with the standard model predictions in all parametrizations considered. In addition, constraints are placed on various two Higgs doublet models.
Highlights
Higgs boson mass is near the electroweak scale, since it is not protected in the standard model (SM) from large quantum corrections [15–19]
A set of combined measurements of Higgs boson production and decay rates has been presented, along with the consequential constraints placed on its couplings to standard model (SM) particles, and on the parameter spaces of several beyond the standard model (BSM) scenarios
The combination is based on analyses targeting the gluon fusion and vector boson fusion production modes, and associated production with a vector boson or a pair of top quarks
Summary
Higgs boson mass is near the electroweak scale, since it is not protected in the SM from large quantum corrections [15–. Leading-order Feynman b, , diagrams for Higgs boson decays in the H → bb, H → τ τ , and H → μμ (upper left); H. q g t t q to the five main production processes, the contributions due to Higgs boson production in association with a single top quark (tH) and either a W boson (tHW) or a quark (tHq), as shown, are included in the analyses that have some sensitivity to them. The tH cross section is small in the SM, being approximately 14% of the ttH cross section, due to the destructive interference between the diagrams shown, which involve the coupling of the Higgs boson to W bosons (tHW process) and top quarks (tHq process). The ATLAS and CMS Collaborations have published combined measurements of Higgs √boson production rates, decay rates, and couplings with the s = 7 and 8 TeV LHC Run 1 data [54,55].
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