Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-SMP-15-008 | ||
| Measurements of the $\mathrm{ pp \to W^{\pm} \gamma \gamma }$ and $\mathrm{ pp \to Z \gamma \gamma } $ cross sections and limits on dimension-8 effective anomalous gauge couplings at $\sqrt{s} =$ 8 TeV | ||
| CMS Collaboration | ||
| February 2016 | ||
| Abstract: We present measurements of the cross sections of the $ \mathrm{ pp \to W ^{\pm} \gamma \gamma } $ and $ \mathrm{ pp \to Z \gamma\gamma } $ final states in the channels where the W boson decays to muons and Z boson decays to electrons or muons. The measurement uses 19.4 fb$^{-1}$ of 8 TeV data collected with the CMS experiment in 2012. We observe the signal for $\mathrm{ W^{\pm} \gamma \gamma } $ with a significance of 2.4$\sigma$ and we observe the $\mathrm{ Z \gamma \gamma }$ signal with a significance of 5.9$\sigma$. Upper limits are placed on anomalous quartic gauge couplings using the $\mathrm{ W^{\pm} \gamma \gamma } $ final state, with particular sensitivity to the $f_{\mathrm{T}, 0}$ coupling. The observed 95% confidence level limit on the $f_{\mathrm{T}, 0}$ coupling is $-37.5 < \frac{f_{\mathrm{T}, 0}}{\Lambda^4} < 38.1$. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, JHEP 10 (2017) 072. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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