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Measurements of Higgs boson production cross sections and couplings in the diphoton decay channel at $ \sqrt{\mathrm{s}} $ = 13 TeV

The CMS collaboration
JHEP 07 (2021) 027, 2021.

Abstract
Measurements of Higgs boson production cross sections and couplings in events where the Higgs boson decays into a pair of photons are reported. Events are selected from a sample of proton-proton collisions at $\sqrt{s} =$ 13 TeV collected by the CMS detector at the LHC from 2016 to 2018, corresponding to an integrated luminosity of 137 fb$^{-1}$. Analysis categories enriched in Higgs boson events produced via gluon fusion, vector boson fusion, vector boson associated production, and production associated with top quarks are constructed. The total Higgs boson signal strength, relative to the standard model (SM) prediction, is measured to be 1.12 $\pm$ 0.09. Other properties of the Higgs boson are measured, including SM signal strength modifiers, production cross sections, and its couplings to other particles. These include the most precise measurements of gluon fusion and vector boson fusion Higgs boson production in several different kinematic regions, the first measurement of Higgs boson production in association with a top quark pair in five regions of the Higgs boson transverse momentum, and an upper limit on the rate of Higgs boson production in association with a single top quark. All results are found to be in agreement with the SM expectations.

  • Signal strengths

    Results from Figure 16

    10.17182/hepdata.102459.v2/t1

    Best-fit values and 68% confidence intervals for the signal strength modifiers. The uncertainty is decomposed ino the theoretical systematic, experimental...

  • Correlations: production mode signal strength

    Results from additional material

    10.17182/hepdata.102459.v2/t2

    Observed and expected correlations between the parameters in the production mode signal strength fit.

  • Systematics: production mode signal strength

    Results from Figure 17

    10.17182/hepdata.102459.v2/t3

    The observed and expected impacts from the various sources of systematic uncertainty on the per-production mode signal strengths. The expected...

  • STXS stage 1.2 maximal merging scheme

    Results from Figure 18 and Table 12

    10.17182/hepdata.102459.v2/t4

    Results of the maximal merging scheme STXS fit. The best fit cross sections are shown together with the respective 68%...

  • Correlations: STXS stage 1.2 maximal merging scheme

    Results from Figure 19

    10.17182/hepdata.102459.v2/t5

    Observed and expected correlations between the parameters in the STXS stage 1.2 maximal merging fit.

  • STXS stage 1.2 minimal merging scheme

    Results from Figure 20 and Table 13

    10.17182/hepdata.102459.v2/t6

    Results of the minimal merging scheme STXS fit. The best fit cross sections are shown together with the respective 68%...

  • Correlations: STXS stage 1.2 minimal merging scheme

    Results from Figure 21

    10.17182/hepdata.102459.v2/t7

    Observed and expected correlations between the parameters in the STXS stage 1.2 minimal merging fit.

  • Kappas 2D: effective coupling modifiers

    Results from Figure 22

    10.17182/hepdata.102459.v2/t8

    Observed likelihood surface.

  • Kappas 2D: effective coupling modifiers (expected)

    Results from additional material

    10.17182/hepdata.102459.v2/t9

    Expected likelihood surface.

  • Kappas 2D: vector boson and fermion

    Results from Figure 22

    10.17182/hepdata.102459.v2/t10

    Observed likelihood surface.

  • Kappas 2D: vector boson and fermion (expected)

    Results from additional material

    10.17182/hepdata.102459.v2/t11

    Expected likelihood surface.

  • STXS stage 0

    Results from additional material

    10.17182/hepdata.102459.v2/t12

    Results of the STXS stage 0 fit. The best fit cross sections are shown together with the respective 68% C.L....

  • Correlations: STXS stage 0

    Results from additional material

    10.17182/hepdata.102459.v2/t13

    Observed and expected correlations between the parameters in the STXS stage 0 fit.

  • STXS stage 1.2 maximal 2D: VBF-like

    Results from additional material

    10.17182/hepdata.102459.v2/t14

    Observed likelihood surface.

  • STXS stage 1.2 maximal 2D: VBF-like (expected)

    Results from additional material

    10.17182/hepdata.102459.v2/t15

    Expected likelihood surface.

  • STXS stage 1.2 maximal 2D: top-associated

    Results from additional material

    10.17182/hepdata.102459.v2/t16

    Observed likelihood surface.

  • STXS stage 1.2 maximal 2D: top-associated (expected)

    Results from additional material

    10.17182/hepdata.102459.v2/t17

    Expected likelihood surface.

Version 2 modifications: Added the impact of systematic uncertainties as an additional table.

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