Probing Neutral Triple Gauge Couplings with $Z^{\ast }\gamma (\nu \bar{\nu }\gamma )$ Production at Hadron Colliders

Abstract

We study probes of neutral triple gauge couplings (nTGCs) via $Z^{\ast }\gamma$ production followed by off-shell decays $Z^{\ast }\to \nu \bar{\nu }$ at the LHC and future $pp$ colliders, including both CP-conserving (CPC) and CP-violating (CPV) couplings. We present the dimension-8 SMEFT operators contributing to nTGCs and derive the correct form factor formulation for the off-shell vertices $Z^{\ast }\gamma V^{\ast }$ ($V=Z,\gamma$) by matching them with the dimension-8 SMEFT operators. Our analysis includes new contributions enhanced by the large off-shell momentum of $Z^{\ast }$, beyond those of the conventional $Z\gamma V^{\ast }$ vertices with on-shell $Z\gamma$. We analyze the sensitivity reaches for probing the CPC/CPV nTGC form factors and the new physics scales of the dimension-8 nTGC operators at the LHC and future 100TeV $pp$ colliders. We compare our new predictions with the existing LHC measurements of CPC nTGCs in the $\nu \bar{\nu }\gamma$ channel and demonstrate the importance of our new method.

25 pages (including supplemental material), only minor refinements, to match the version of PRD(letter)

References in corpus (11)

• Dimension-8 Operators in the Standard Model Effective Field Theory
• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• Complete Set of Dimension-8 Operators in the Standard Model Effective Field Theory
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Probing New Physics in Dimension-8 Neutral Gauge Couplings at $e^{+}{e}^{-}$ Colliders
• Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders
• The study of neutral triple gauge couplings in the process $e^{+}{e}^{-}\to Z\gamma$ including unitarity bounds
• Probing anomalous $ZZ\gamma$ and $Z\gamma \gamma$ Couplings at the $e^{+}{e}^{-}$ Colliders using Optimal Observable Technique
• Constraining CP violating operators in charged and neutral triple gauge couplings
• Model-independent study on the anomalous $ZZ\gamma$ and $Z\gamma \gamma$ couplings at the future muon collider
• Probe of the anomalous neutral triple gauge couplings in photon-induced collision at future muon colliders

Cited by in corpus (9)

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• Probing CP-Violating Neutral Triple Gauge Couplings at Electron-Positron Colliders
• Non-diagonal contributions to $Z\gamma V^{\ast }$ vertex, polarizations and bounds on $Z\overline{t}q$ couplings
• Search for Neutral Triple Gauge Couplings with $ZZ$ Production at Future Electron Positron Colliders
• A quantum machine learning classifier to search for new physics
• $CP$-violating effects of the neutral triple gauge couplings in $Z(\ell \ell )\gamma$ production at the LHC
• Probing Neutral Triple Gauge Couplings via $ZZ$ Production at $e^{+}{e}^{-}$ Colliders with Machine Learning
• Probing Neutral Triple Gauge Couplings at e- p colliders