CP violating anomalous couplings in $W\gamma$ and $Z\gamma$ production at the LHC

Abstract

The ATLAS and CMS collaborations have recently published new limits on CP conserving anomalous couplings from the $W\gamma$ and $Z\gamma$ production processes. We study the corresponding limits that can be placed on the CP violating anomalous couplings ${\kappa }_{t}ild{e}_{\gamma }$ and $h_{\gamma ,Z}^1$ at the LHC. We find that the process $pp-->W\gamma$ at 14 TeV can place the 95% CL limit $|{\kappa }_{t}ild{e}_{\gamma }|<0.05$ with 10 fb^{-1} which is comparable to the existing LHC bound on the CP conserving anomalous couplings ${\kappa }_{\gamma }$. Similarly, the process $pp-->Z\gamma$ can place the 95% CL limits $|h_{\gamma }^1|<20$ and $|h_Z^1|<40$ respectively. None of these limits is derived from a truly CP-odd observable so that it is not possible to separate the effects of the CP violating anomalous couplings from the rest.

16 LaTex pages, 4 figures, 5 tables, accepted version for publication in Physical Review D

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• FeynRules - Feynman rules made easy
• MCFM for the Tevatron and the LHC
• Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings
• Measurement of W gamma and Z gamma production cross sections in pp collisions at sqrt(s) = 7 TeV and limits on anomalous triple gauge couplings with the ATLAS detector
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Cited by in corpus (10)

• A Reduced basis for CP violation in SMEFT at colliders and its application to Diboson production
• Constraining SMEFT operators with associated $h\gamma$ production in Weak Boson Fusion
• Constraining CP violating operators in charged and neutral triple gauge couplings
• Constraints on CP-violating gauge-Higgs operators
• Distinguishing CP-odd couplings of the Higgs boson to weak boson pairs
• Search for the limits on anomalous neutral triple gauge couplings via $ZZ$ production in the $\ell \ell \nu \nu$ channel at FCC-hh
• Electroweak bounds on Higgs pseudo-observables and $h\to 4\ell$ decays
• CP violating anomalous couplings in $W$ jet production at the LHC
• T-odd anomalous interactions of the top-quark at the Large Hadron Collider
• CP violation from spin-1 resonances in a left-right dynamical Higgs context