Yazar "Koksal, M." seçeneğine göre listele

Listeleniyor 1 - 11 / 11
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    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.
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    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.
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    Expected sensitivity on the anomalous quartic neutral gauge couplings in γγ collisions at the CLIC
    (Springer Heidelberg, 2023) Gutierrez-Rodriguez, A.; Gurkanli, E.; Koksal, M.; Ari, V.; Hernandez-Ruiz, M. A.
    The non-Abelian gauge structure of the Standard Model (SM) implies the presence of multi-boson self-interactions. Precise measurements of these interactions allow testing the nature of the SM and new physics contributions arising from the beyond SM. The investigation of these interactions can be approached in a model-independent manner using an effective theory approach, which forms the main motivation of this study. In this paper, we examine the anomalous neutral quartic gauge couplings through the process yy -> ZZ at the Compact Linear Collider with the center-of-mass energy of =3 TeV and integrated luminosity of =5 a-1. The anomalous neutral quartic gauge couplings are implemented into FeynRules to generate a UFO module inserted into Madgraph to create background and signal events. These events are passed through Pythia 8 for parton showering and Delphes to include realistic detector effects. We obtain that the sensitivities on the anomalous quartic neutral gauge couplings with 95% Confidence Level are given as: 0/Lambda 4=[-1.06;1.08]x10-3 TeV-4, 1/Lambda 4=[-1.06;1.08]x10-3 TeV-4,2/Lambda 4=[-1.06;1.08]x10-3 TeV-4,0/Lambda 4=[-1.06;1.08]x10-3 TeV-4, 5/Lambda 4=[-4.08;4.08]x10-4 TeV-4 and 8/Lambda 4=[-1.10;1.10]x10-4 TeV-4. Our results on the anomalous quartic neutral gauge couplings are set to a more stringent sensitivity concerning the recent experimental limits
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    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.
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    Model independent study for the anomalous quartic WW γγ couplings at future electron-proton colliders
    (Elsevier, 2020) Ari, V.; Gurkanli, E.; Billur, A. A.; Koksal, M.
    The Large Hadron Electron Collider and the Future Circular Collider-hadron electron with high centerof-mass energy and luminosity allow to better understand the Standard Model and to examine new physics beyond the Standard Model in the electroweak sector. Multi-boson processes permit for a measurement of the gauge boson self-interactions of the Standard Model that can be used to determine the anomalous gauge boson couplings. For this purpose, we present a study of the process ep -> nu(e)gamma gamma j at the Large Hadron Electron Collider with center-of-mass energies of 1.30, 1.98 TeV and at the Future Circular Collider-hadron electron with center-of-mass energies of 7.07, 10 TeV to interpret the anomalous quartic WW gamma gamma gauge couplings using a model independent way in the framework of effective field theory. We obtain the sensitivity limits at 95% Confidence Level on 13 different anomalous couplings arising from dimension-8 operators. The best limit in f(Mi)/Lambda(4)(i= 0, 1, 2, 3, 4, 5, 7) parameters is obtained for fM(2)/Lambda(4)parameter while the best sensitivity derived on fTi/Lambda(4)(i= 0, 1, 2, 5, 6, 7) parameters is obtained for f(T5)/Lambda(4). In addition, this study is the first report on the anomalous quartic couplings determined by effective Lagrangians at epcolliders. (C) 2020 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 SCOAP(3).
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    Model-independent study on the anomalous Z Z γ and Z γ γ couplings at the future muon collider
    (Springer Heidelberg, 2022) Senol, A.; Spor, S.; Gurkanli, E.; Cetinkaya, V.; Denizli, H.; Koksal, M.
    In this study, we investigate the potential of mu(-)mu(+) -> Z gamma -> v v gamma process at the future muon collider with a center-of mass energy of 3 TeV to examine the anomalous ZZ gamma and Z gamma gamma neutral triple gauge couplings defining CP-conserving CB?W/A(4) coupling and three CP-violating CBB/A(4), CBW/A(4), CWW/A(4) couplings. All signal and relevant background events are generated in MadGraph and passed through Pythia for parton showering and hadronization. Detector effects are also considered via tuned muon detector cards in Delphes. The effects of systematic uncertainties of 0%, 3% and 5% on the sensitivities are studied. The best sensitivities obtained from the process mu(-)mu(+) -> Z gamma -> v v gamma are [-6.53; 6.64]x 10(-2) TeV-4 on CP-conserving CB?W/A(4) coupling and [-2.47; 2.47] x 10(-2) TeV-4, [-8.46; 8.46] x 10(-2) TeV(-4 )and [-2.20; 2.20] x 10(-1 )TeV(-4) on CP-conserving CBB/A4, CBW/A4, CWW/A4 couplings , respectively. Our obtained results on the anomalous neutral gauge couplings set more stringent sensitivity, ranging between 5 and 15 times than the current experimental results while slightly better than the phenomenological studies at future pp colliders such as the HL-LHC, the HE-LHC and the FCC-hh, respectively. On the other hand, we can see that the bounds on the anomalous neutral gauge couplings expected to be obtained for the future e-e+ colliders such as the CLIC are roughly 2 times better than our results.
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    Search for the anomalous ZZZ and Z Z γ gauge couplings through the process e+ e- → Z Z with unpolarized and polarized beams
    (Springer Heidelberg, 2024) Cetinkaya, V.; Spor, S.; Gurkanli, E.; Koksal, M.
    This work offers the constraints on the anomalous neutral triple gauge couplings for the process e(+)e(-)-> ZZ at the CLIC with root s=3 TeV. The realistic CLIC detector environments and their effects are considered in our analysis. The study is planned for the decays of produced Z bosons to a pair of charged leptons (electrons or muons) and neutrino pairs. The bounds on the anomalous neutral triple gauge couplings defining CP-violating C-BW/Lambda(4) coupling and three CP-conserving C-WW/Lambda(4), C-BW/Lambda(4), and C-BB/Lambda(4) couplings are obtained. Also, the effects and advantages of polarization for incoming electron beams in these calculations are investigated.
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    Search for the anomalous ZZγ and Zγγ couplings via ννγ production at the CLIC
    (Elsevier, 2022) Spor, S.; Gurkanli, E.; Koksal, M.
    The non-Abelian gauge structure of the Standard Model implies the presence of the multi-boson self interactions. Precise measurements in experimental and theoretical studies of these interactions allow not only testing the nature of the Standard Model but also new physics contribution coming from the beyond Standard Model. These interactions can be examined using a model-independent way in effective theory approach that composes the motivation part of this study. In this paper, we examine the anomalous ZZ gamma and Z gamma gamma neutral triple gauge couplings via the process e-e+ -> Z gamma for the neutrino-antineutrino pair decay of Z boson. It has performed with both unpolarized and polarized electron beams at the Compact Linear Collider with root s = 3 TeV. The study focused on CP-conserving C-BW/(4) and CP-violating CBB/(4), CBW/(4), CWW/(4) couplings. Obtained sensitivities on the anomalous neutral triple gauge couplings with 95% Confidence Level are given with systematic uncertainties of 0%, 5% and 10% for unpolarized, -80% and 80% polarized electron beams with integrated luminosities of L-int = 5 ab(-1), L -> = 4 ab(-1) and Lint = 1 ab(-1), respectively. Comparing the latest experimental limits and related phenomenological studies, our results on the anomalous neutral gauge couplings are set more stringent sensitivity between 10-30 times of magnitude. (C)& nbsp;2022 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.
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    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.
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    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.
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    Study on the anomalous quartic W+W- γγ couplings of electroweak bosons in e- p collisions at the LHeC and the FCC-he
    (Springer, 2021) Gutierrez-Rodriguez, A.; Hernandez-Ruiz, M. A.; Gurkanli, E.; Ari, V.; Koksal, M.
    In this paper, a study is carried out on the e(-) p -> e(-) gamma* p -> pW(-) gamma nu(e) production to probe quartic W+ W- gamma gamma couplings at the Large Hadron electron Collider (LHeC) with root s = 1.30, 1.98 TeV and at the Future Circular Collider-hadron electron (FCC-he) with root s = 3.46, 5.29 TeV. Production cross-sections are determined for both at leptonic and hadronic decay channels of the W-boson. With the data from future e(-) p colliders, it is possible to obtain sensitivity measures at 95% C.L. on the anomalous f(M,i)/Lambda(4) and f(T, j)/Lambda(4) couplings which are competitive with the limits obtained by the LHC, as well as with others limits reported in the literature. The production mode e(-) p -> e(-) gamma* p -> pW(-) gamma nu(e) in e(-) p collisions offers a window for study the quartic W+ W- gamma gamma electroweak bosons couplings at the LHeC and the FCC-he, which provides a much cleaner collision environment than the LHC.