Compact Muon Solenoid
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| CMS-PAS-SMP-20-005 | ||
| W$^{\pm}\gamma$ differential cross sections and effective field theory constraints at $\sqrt{s}=$ 13 TeV | ||
| CMS Collaboration | ||
| March 2021 | ||
| Abstract: Differential cross section measurements of W$^{\pm}\gamma$ production in proton-proton collisions at $\sqrt{s} = $ 13 TeV are presented. The data set used in this study is collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 137 fb$^{-1}$. Candidate events containing an electron or muon, a photon, and missing transverse momentum are selected. The measurements are compared to standard model predictions computed at next-to-leading order and next-to-next-to-leading order in perturbative quantum chromodynamics. Constraints on the presence of heavy new physics affecting the WW$\gamma$ vertex are determined within an effective field theory framework, focusing on the $\mathcal{O}_{3W}$ operator. A simultaneous measurement of the photon transverse momentum and the azimuthal angle of the charged lepton in a special reference frame is performed. This two-dimensional approach yields sensitivity to the interference between the standard model and $\mathcal{O}_{3W}$ that is enhanced by up to a factor of ten compared to using the transverse momentum alone. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to PRD. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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