Sensitivities on the anomalous quartic and couplings at the CLIC

E. Gurkanli

doi:10.1140/epjc/s10052-024-12428-y

2024 Impact factor 4.8

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 55
https://doi.org/10.1140/epjc/s10052-024-12428-y

Regular Article - Theoretical Physics

Sensitivities on the anomalous quartic $γ γ γ γ$ $\gamma \gamma \gamma \gamma$ and $γ γ γ Z$ $\gamma \gamma \gamma Z$ couplings at the CLIC

E. Gurkanli^a

Department of Physics, Sinop University, Sinop, Turkey

^a egurkanli@sinop.edu.tr

Received: 6 July 2023
Accepted: 10 January 2024
Published online: 18 January 2024

Abstract

It is essential to directly investigate the self-couplings of gauge bosons in the Standard Model (SM) due to its non-Abelian nature, as these couplings play a significant role in comprehending the gauge structure of the model. The discrepancies between the Standard Model’s expectations and the measured value of gauge boson self-couplings serve as strong evidence for new physics phenomena extending beyond the Standard Model. Such deviations provide valuable insights into the nature of new physics and potentially lead to a deeper understanding of fundamental particles and their interactions. This study examines the sensitivities of anomalous couplings associated with dimension-8 operators that affect the $γ γ γ γ$ $\gamma \gamma \gamma \gamma$ and $Z γ γ γ$ $Z\gamma \gamma \gamma$ quartic vertices. The study focuses on the process $e^{-} γ \to e^{-} γ γ$ $e^{-}\gamma \rightarrow e^{-}\gamma \gamma$ with the incoming photon under Weizsäcker-Williams approximation at the stage-3 scenario of Compact Linear Collider (CLIC) that refers to a CoM energy of 3 TeV. Due to the CLIC options, we take into account both unpolarized and $\mp 80 %$ ${\mp }80\%$ polarized electron beam with the related integrated luminosities of $L = 5, 4, 1$ ${\mathcal {L}}=5, 4, 1$ ${ab}^{- 1}$ ${\textrm{ab}}^{-1}$ under the systematic uncertainties of $δ_{sys} = 0, 3, 5$ $\delta _{sys}=0, 3, 5$ . Obtained sensitivities on the anomalous quartic gauge couplings (aQGCs) for the process $e^{-} γ \to e^{-} γ γ$ $e^{-}\gamma \rightarrow e^{-}\gamma \gamma$ at $\sqrt{s} = 3$ ${\sqrt{s}}= 3$ TeV and various polarizations are improved by a factor of 2–200 times better for the couplings $f_{T, j} / Λ^{4}$ $f_{T,j}/\Lambda ^{4}$ compared with the experimental results reported by CMS Collaboration in Tumasyan et al. (JHEP 10:174, 2021).

© The Author(s) 2024

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