Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-SMP-19-013 | ||
| Measurements of the pp $\to$ W$^{\pm}\gamma\gamma$ and pp $\to$ Z$\gamma\gamma$ cross sections and limits on anomalous quartic gauge couplings at $\sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| March 2021 | ||
| Abstract: The cross section for W or Z boson production in association with two photons is measured in proton-proton collisions at a centre-of-mass energy of 13 TeV. The dataset corresponds to an integrated luminosity of 137 fb$^{-1}$ collected by the CMS experiment at the LHC. The $\mathrm{W}(\ell\nu)\gamma\gamma$ and $\mathrm{Z}(\ell\ell)\gamma\gamma$ (where $\ell=$ e, $\mu$) cross sections are extracted in the phase space identified by an electron (muon) transverse momentum threshold of 35 (30) GeV and a photon transverse momentum threshold of 20 GeV. The measured cross sections are $\sigma(\mathrm{W}\gamma\gamma) = $ 13.63 $^{+1.93}_{-1.89}$ (stat.) $^{+4.04}_{-4.02}$ (syst.) $\pm$ 0.08 (PDF+scale) fb and $\sigma(\mathrm{Z}\gamma\gamma) = $ 5.41 $^{+0.58}_{-0.55}$ (stat.) $^{+0.64}_{-0.70}$ (syst.) $\pm$ 0.06 (PDF+scale) fb. Limits on anomalous quartic gauge couplings are set in the framework of an effective field theory with dimension-8 operators. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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