Search for heavy H$γ$ and Z$γ$ resonances with a bottom quark-antiquark pair in the final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
CMS-B2G-24-007, 2025.

Abstract
A search for heavy resonances decaying into a Higgs boson (H) or a Z boson and a photon ($γ$), with the H or Z bosons decaying to a bottom quark-antiquark pair ($\mathrm{b\bar{b}}$) is presented. The analysis is performed using proton-proton collision data at $\sqrt{s}$ = 13 TeV collected by the CMS experiment at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 138 fb$^{-1}$. The analyzed events contain a photon and a massive large-radius jet originating from a Lorentz-boosted $\mathrm{b\bar{b}}$ system. An advanced transformer-based algorithm classifies jets according to their substructure and quark flavors, forming a tagger that identifies jets as candidates from H/Z $\to$$\mathrm{b\bar{b}}$ decays. A set of parametric functions is used to fit the photon-jet invariant mass spectrum and to extract potential signals. No significant excess is observed above the standard model expectations. The results set upper limits at 95% confidence level on the product of the cross section and the branching fraction for spin-1 H$γ$ resonances and spin-0 Z$γ$ resonances, below 0.1 and 0.3 fb, respectively, representing the most stringent limits to date.

  • Fig. 6 $m_{j\gamma}$ SRH1

    Data from Figure 6 located on page 14.

    10.17182/hepdata.158361.v1/t1

    Figure 6. Postfit $m_{j\gamma}$ spectra in the SRH1. The lower panel shows the pull distributions with respect to the best-fit...

  • Fig. 6 $m_{j\gamma}$ SRZ1

    Data from Figure 6 located on page 14.

    10.17182/hepdata.158361.v1/t2

    Figure 6. Postfit $m_{j\gamma}$ spectra in the SRZ1. The lower panel shows the pull distributions with respect to the best-fit...

  • Fig. 6 $m_{j\gamma}$ SRH2

    Data from Figure 6 located on page 14.

    10.17182/hepdata.158361.v1/t3

    Figure 6. Postfit $m_{j\gamma}$ spectra in the SRH2. The lower panel shows the pull distributions with respect to the best-fit...

  • Fig. 6 $m_{j\gamma}$ SRZ2

    Data from Figure 6 located on page 14.

    10.17182/hepdata.158361.v1/t4

    Figure 6. Postfit $m_{j\gamma}$ spectra in the SRZ2. The lower panel shows the pull distributions with respect to the best-fit...

  • Fig. 7 Limits on Z-prime (0.01%)

    Data from Figure 7 located on page 15.

    10.17182/hepdata.158361.v1/t5

    Figure 7. The 95% CL upper limits on the product of production cross section and branching fraction $\sigma\mathcal{B}$ for $Z'\rightarrow...

  • Fig. 7 Limits on $S$ (0.014%)

    Data from Figure 7 located on page 15.

    10.17182/hepdata.158361.v1/t6

    Figure 7. The 95% CL upper limits on the product of production cross section and branching fraction $\sigma\mathcal{B}$ for $S\rightarrow...

  • Fig. 7 Limits on $S$ (5.6%)

    Data from Figure 7 located on page 15.

    10.17182/hepdata.158361.v1/t7

    Figure 7. The 95% CL upper limits on the product of production cross section and branching fraction $\sigma\mathcal{B}$ for $S\rightarrow...

  • Fig. 7 Limits on $S$ (10%)

    Data from Figure 7 located on page 15.

    10.17182/hepdata.158361.v1/t8

    Figure 7. The 95% CL upper limits on the product of production cross section and branching fraction $\sigma\mathcal{B}$ for $S\rightarrow...

Loading Data...

Ask a Question


Your question will be emailed to those involved with the submission. Please mention the relevant table.


Please log in to HEPData to send a question.