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Öğe Analysis of the anomalous quartic WWWW couplings at the LHeC and the FCC-he(Springer Heidelberg, 2021) Gurkanli, E.; Ari, V; Billur, A. A.; Koksal, M.The quartic gauge boson couplings that identify the strengths of the gauge boson self-interactions are exactly determined by the non-Abelian gauge nature of the Standard Model. The examination of these couplings at ep collisions with high center-of-mass energy and high integrated luminosity provides an important opportunity to test the validity of the Standard Model and the existence of new physics beyond the Standard Model. The quartic gauge boson couplings can contribute directly to multi-boson production at colliders. Therefore, we examine the potential of the process ep -> nu(e)W(+)W(-)j at the Large Hadron Electron Collider and the Future Circular Collider-hadron electron to study non-standard WWWW couplings in a model independent way by means of the effective Lagrangian approach. We present an investigation on measuring W+W- production in pure leptonic and semileptonic decay channels. In addition, we calculate the sensitivity limits at 95% Confidence Level on the anomalous fM0/Lambda(4), fM1/Lambda(4), fM7/Lambda(4), fS0/Lambda(4), fS1/Lambda(4), fT0/Lambda(4), fT1/Lambda(4) and fT2/Lambda(4) couplings obtained by dimension-8 operators through the process ep -> nu(e)W(+)W(-)j for the Large Hadron Electron Collider and the Future Circular Hadron Electron Collider's different center-of-mass energies and integrated luminosities. Our results show that with the process ep -> nu(e)W(+)W(-)j at the Large Hadron Electron Collider and the Future Circular Collider-hadron electron the sensitivity estimated on the anomalous WWWW couplings can be importantly strengthened.Öğe Anomalous quartic W+W- γγ couplings in e- p collisions at the LHeC and the FCC-he(Springer Heidelberg, 2020) Ari, V; Gurkanli, E.; Gutierrez-Rodriguez, A.; Hernandei-Ruir, M. A.; Koksal, M.We conduct a study on measuring W+W- production and on the sensitivity limits at 95% confidence level on thirteen anomalous couplings obtained by dimension-8 operators related to the anomalous quartic W+ W-gamma gamma couplings. We consider the main e(-) p -> e(-) gamma* gamma p -> e(-) W+ W- p reaction with the sub-process gamma(*) gamma*-> W+ W- at the Large Hadron electron Collider (LHeC) and the Future Circular Collider-hadron electron (FCC-he). For the LHeC, energies of the e(-) beams are taken to be E-e = 60 and 140 GeV and the energy of the p beams is taken to be E-p = 7 TeV. For the FCC-he, energies of the e(-) beams are taken to be E-e = 60 and 140 GeV and the energy of the p beams is taken to be E-p = 50 TeV, respectively. It is interesting to note that the LHeC and the FCC-he will lead to model-independent limits on the anomalous quartic W+ W- gamma gamma couplings which are one order of magnitude more stringent than the CMS Collaboration limits and are competitive with other limits reported in the literature.Öğe Future projections on the anomalous WWγγ couplings in hadron-hadron interactions at the FCC-hh(Iop Publishing Ltd, 2022) Gutierrez-Rodriguez, A.; Ari, V; Gurkanli, E.; Koksal, M.; Hernandez-Ruiz, M. A.We carry out a study in the approach of a dimension-eight effective field theory on the anomalous quartic WW gamma gamma couplings that arise from the process pp -> WW gamma gamma at the Future Circular Collider-hadron hadron (FCC-hh). The process is sensitive to the WW gamma gamma vertex, and future projections on the anomalous f(M,i)/Lambda(4) and f(T,j)/Lambda(4) couplings can be put by measurements of WW gamma gamma production. We illustrate the physics opportunities and reach of the FCC-hh operating for a high integrated luminosity scenario of L = 1,5, 10, 30 ab(-1) of proton-proton collisions at a center-of-mass energy of root s = 100 TeV and systematic uncertainties of delta(sys) = 0%, 3%, 5%, 10%. Production cross-sections of the signal and the sensitivity constraints on the anomalous f(M ,i)/Lambda(4) and f(T ,j)/Lambda(4)couplings at 95% C.L. are identified through the leptonic and hadronic decay modes of the W-boson. The FCC-hh sensitivity on these anomalous couplings is expected might reach up to the order of magnitude O(10(-4) - 10(1)). These sensitivity perspectives indicate that the pp -> WW gamma gamma channel at the FCC-hh has a greater potential to search for the anomalous quartic WW gamma gamma couplings and to search for new physics than present colliders.Öğe Sensitivity physics expected to the measurement of the quartic WWγγ couplings at the LHeC and the FCC-he(Iop Publishing Ltd, 2020) Gurkanli, E.; Ari, V; Gutierrez-Rodriguez, A.; Hernandez-Ruiz, M. A.; Koksal, M.We explore the physics expected sensitivity at the Large Hadron electron Collider (LHeC) and the future circular collider-hadron electron ( FCC-he) to search for the anomalous quartic WW gamma gamma couplings in single W-boson production in association with a photon. We study the process ep -> e(-)gamma*p -> eW gamma q'X via the subprocess gamma*q -> W gamma q'. The center-of-mass energies and luminosities of the LHeC are assumed to be root s = 1.30, 1.98 TeV, L = 10 - 100 fb(-1) and for the FCC-he root s = 3.46, 5.29 TeV and L = 100 - 1000 fb(-1). Considering these energies and luminosities, we estimate sensitivity measures on the anomalous quartic WW gamma gamma couplings at 95% C.L., which can be an order of magnitude more stringent than the experimental limits reported by ATLAS and CMS Collaborations at the LHC.Öğe Study of the projected sensitivity on the anomalous quartic gauge couplings via Zγγ production at the CLIC(Elsevier, 2023) Ari, V; Gurkanli, E.; Koksal, M.; Gutierrez-Rodriguez, A.; Hernandez-Ruiz, M. A.Gauge boson self-couplings are completely defined by the non-Abelian gauge symmetry of the Standard Model (SM). For this reason, a direct search for these couplings is extremely significant in understanding the gauge structure of the SM. The possible deviation from the SM predictions of gauge boson self-couplings would be a sign of the presence of new physics beyond the SM. In this work, we study the sensitivities on the anomalous couplings defined by dimension-8 operators related to the ZZ gamma gamma and Z gamma gamma gamma quartic vertices through the process e+e- -> Z gamma gamma with Z-boson decaying to charged leptons at the Compact Linear Collider (CLIC). We analyze the center-of-mass energy of 3 TeV, integrated luminosities of L = 1, 4, 5 ab-1, systematic uncertainties of 8sys = 0%, 3%, 5%, unpolarized and polarized electron beams and considering the Initial State Radiation and Beamstrahlung effects for extraction of expected sensitivity on the anomalous fT,j /A4 couplings at 95% confidence level, which are especially sensitive to the Z gamma gamma channel. It is clear from the results that we expect better limits on the couplings if the systematic error is improved. The best limits obtained on the anomalous quartic couplings for the process e+e- -> Z gamma gamma with root s = 3 TeV, L = 5 ab-1, and delta sys = 0% can be approximately improved up to about 1.1 times better than the limits obtained with delta sys = 5%. Our sensitivities on the anomalous quartic couplings can set more stringent sensitivity by two orders of magnitude concerning the best sensitivity derived from the current experimental limits. Finally, with initial electron beam polarization, the sensitivity of the anomalous quartic couplings improves by almost a factor of 1.2.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org/licenses/by /4 .0/). Funded by SCOAP3.
