Observation of WW$\gamma$ production and search for H$\gamma$ production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
Phys.Rev.Lett. 132 (2024) 121901, 2024.

Abstract (data abstract)
The observation of $WW\gamma$ production in proton-proton collisions at a center-of-mass energy of 13\TeV with an integrated luminosity of 138\fbinv is presented. The observed (expected) significance is 5.6 (5.1) standard deviations. Events are selected by requiring exactly two leptons (one electron and one muon) of opposite charge, moderate missing transverse momentum, and a photon. The measured fiducial cross section for $WW\gamma$ is $ 5.9 \pm 0.8 \text{(stat)} \pm 0.8 \text{(syst)} \pm 0.7 \text{(modeling)} fb$, in agreement with the next-to-leading order quantum chromodynamics prediction. The analysis is extended with a search for the associated production of the Higgs boson and a photon, which is generated by a coupling of the Higgs boson to light quarks. The result is used to constrain the Higgs boson couplings to light quarks.

  • Fiducial Cross-section Table

    Data from Paper

    10.17182/hepdata.144361.v2/t1

    The Measured and theoretical cross sections in the fiducial volume.

  • Table 1

    Data from Table 1

    10.17182/hepdata.144361.v2/t2

    The number of events in data and simulations after the fit to data in the Top$\gamma$ CR, SS$WW\gamma$ CR, and...

  • Table 2

    Data from Table 2

    10.17182/hepdata.144361.v2/t3

    Upper limits on the cross section and derived limits in terms of Yukawa coupling at 95% CL for Hγ production...

  • Figure 2a

    Data from Figure 2 a

    10.17182/hepdata.144361.v2/t4

    The distributions of the invariant mass of the dilepton-photon system after the signal region selection before the fit to data.The...

  • Figure 2b

    Data from Figure 2 b

    10.17182/hepdata.144361.v2/t5

    The distributions of the invariant mass of the transverse mass of the WW system after the signal region selection before...

  • Figure 3a

    Data from Figure 3 a

    10.17182/hepdata.144361.v2/t6

    The unrolled two-dimensional mTWW-mll$\gamma$ distributions with category 0 jet after the fit to data. The data are compared to the...

  • Figure 3b

    Data from Figure 3 b

    10.17182/hepdata.144361.v2/t7

    The unrolled two-dimensional mTWW-mll$\gamma$ distributions with category 1more jets after the fit to data. The data are compared to the...

Version 2 modifications: Added intermediate tau conribution and fiducial cross section result

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