Yazar "Gurkanli, Emre" seçeneğine göre listele

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    Öğe
    Prediction for the Anomalous ZZZ and ZZγ Couplings via two Z-boson Production at the CLIC
    (2023) Gurkanli, Emre
    The non-Abelian nature of the Standard Model (SM) entails the existence of the gauge bosons' self-interactions. The gauge bosons' self-interactions are important to test the SM and see the new physics effects. These effects can be analyzed in the effective theory approach which is the main aim of this study. We examine the ZZZ and ZZγ anomalous neutral triple gauge couplings (aNTGC) via the process e^- e^+→ZZ with both unpolarized and polarized electron beam with the √s=3 TeV at CLIC. In the final state, semi-leptonic decay of Z-bosons (Z→jj , Z→ν_l (ν_l ) ̅ ) are considered. We focused on CP-violating C_BB/Λ^4 , C_BW/Λ^4 , C_WW/Λ^4 and CP-conserving C_(B ̅W)/Λ^4 couplings. The sensitivities are obtained at 95% Confidence Level with luminosities of L_int=5 ab-1, L_int=1 ab-1 and L_int=4 ab-1 for unpolarized, 80% and -80% polarized electron beams, respectively. Obtained sensitivities on anomalous couplings are 3-20 times stringent than the current experimental limits and comparable with the related phenomenological studies in the literature.
  • [ X ]
    Öğe
    Probing CP-violating Higgs-Gauge Boson Couplings at the Future Muon Collider
    (Oxford Univ Press Inc, 2025) Gurkanli, Emre; Spor, Serdar
    We explore the sensitivity of future muon colliders to CP-violating interactions in the Higgs sector, specifically focusing on the process $\mu <^>- \mu <^>+ \rightarrow h \bar{\nu _{l}} \nu _{l} \rightarrow b\bar{b} \bar{\nu _{l}}\nu _{l}$. Using a model-independent approach within the framework of the Standard Model effective field theory, we analyze the contribution of dimension-six operators to Higgs-gauge boson couplings, emphasizing CP-violating effects. To simulate the process, all signal and background events are generated through MadGraph. The analysis provides 95% confidence level limits on the relevant Wilson coefficients $\tilde{c}_{HB}$, $\tilde{c}_{HW}$, $\tilde{c}_{\gamma }$, with a comparative discussion of existing experimental and phenomenological constraints. Our best constraints on $\tilde{c}_{HB}$, $\tilde{c}_{HW}$, $\tilde{c}_{\gamma }$ with an integrated luminosity of 10 ab$<^>{-1}$ are $[-0.017\,428;0.018\,991]$, $[-0.002\,880;0.002\,586]$, and $[-0.010\,784;0.011\,381]$, respectively. In this context, this study highlights the capability of future muon collider experiments to probe new physics in the Higgs sector, potentially offering tighter constraints on CP-violating Higgs-gauge boson interactions than those provided by current colliders.