Measurement of the Z$γ$ production cross section and search for anomalous neutral triple gauge couplings in pp collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
CMS-SMP-22-009, 2026.

Abstract (data abstract)
Measurement of the $Z\gamma$ production cross section and search for anomalous neutral triple gauge couplings in pp collisions at $\sqrt{s}=13$ TeV. CMS SMP-22-009. Dataset: full Run-2 pp collisions at $\sqrt{s}=13$ TeV corresponding to 138 fb$^{-1}$. This HEPData submission provides: (i) post-fit, reconstruction-level $p_{T}^{\gamma}$ distributions in the ECAL barrel (EB) and endcaps (EE) signal regions corresponding to Figure 4, with observed data and post-fit yields for the fitted components; (ii) measured and predicted fiducial cross sections (Table 3); (iii) measured and predicted cross sections vs $p_{T}^{\gamma}$ (Table 4); (iv) expected and observed 95% CL intervals for anomalous neutral triple gauge coupling parameters (Table 5).

  • Figure4_EB_pTgamma

    Figure 4 (left)

    10.17182/hepdata.167736.v1/t1

    Post-fit reconstruction-level photon transverse momentum $p_{T}^{\gamma}$ distribution in the ECAL barrel signal region. The yields correspond to the post-fit expectation...

  • Figure4_EE_pTgamma

    Figure 4 (right)

    10.17182/hepdata.167736.v1/t2

    Post-fit reconstruction-level photon transverse momentum $p_{T}^{\gamma}$ distribution in the ECAL endcaps signal region. The yields correspond to the post-fit expectation...

  • Table3_FiducialCrossSections

    Table 3

    10.17182/hepdata.167736.v1/t3

    Measured and predicted fiducial cross sections (fb) in the EB, EE, and combined phase space. The fiducial phase space definition...

  • Table4_CrossSectionVsPtGamma

    Table 4

    10.17182/hepdata.167736.v1/t4

    Measured and predicted cross sections (fb) in bins of photon transverse momentum $p_{T}^{\gamma}$. The fiducial phase space definition follows the...

  • Table5_aNTGC_95CL

    Table 5

    10.17182/hepdata.167736.v1/t5

    Expected and observed 95% CL intervals for anomalous coupling parameters. All other anomalous coupling parameters are fixed to zero when...

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