arXiv subjects

S. Spor

Publications and source records attributed to S. Spor.

10 recordsLinked to original sources

arXiv2024

Study on the sensitivity of the Higgs boson couplings in photon-photon collision at CLIC and muon collider

In a model-independent way, we explore the potential of photon-induced interactions with the process $γ^* γ^* \rightarrow ZZ$ to investigate CP-conserving and CP-violating dimension-six operators of Higgs-gauge boson couplings using the Standard Model Effective Field Theory (SMEFT). The existence of anomalous $Hγγ$ and $HZZ$ couplings is discussed at 3 TeV Compact Linear Collider (CLIC) and 10 TeV Muon Collider (MuC) with integrated luminosities of 5 and 10 ab$^{-1}$, respectively. All signal and relevant background events are generated in MadGraph and passed through PYTHIA for parton showering and hadronization. The detector effects are evaluated using CLIC and MuC detector cards tuned in Delphes. We report the 95% confidence level limits on the Wilson coefficients $\overline{c}_γ$, $\overline{c}_{HB}$, $\overline{c}_{HW}$, $\widetilde{c}_γ$, $\widetilde{c}_{HB}$, and $\widetilde{c}_{HW}$ and compare them with the experimental and phenomenological limits.

hep-ph↗

arXiv2024

Search for the anomalous $ZZZ$ and $ZZγ$ gauge couplings through the process $e^+e^- \to ZZ $ with unpolarized and polarized beams

This work offers the constraints on the anomalous neutral triple gauge couplings for the process $e^+e^- \to ZZ $ at the CLIC with $\sqrt{s}=3$ 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 $C_{\widetilde{B}W}/{Λ^4}$ coupling and three $CP$-conserving $C_{WW}/{Λ^4}$, $C_{BW}/{Λ^4}$, and $C_{BB}/{Λ^4}$ couplings are obtained. Also, the effects and advantages of polarization for incoming electron beams in these calculations are investigated.

hep-ph↗

arXiv2023

Investigation of anomalous triple gauge couplings in $μγ$ collision at multi-TeV muon colliders

The pursuit of discovery in particle physics has always required study at the highest possible energies. Multi-TeV muon colliders, which have important advantages, offer unprecedented potential for investigating new physics beyond the Standard Model. We extensively assume a range of center-of-mass energies from 3 to 30 TeV and a range of integrated luminosities from 1 to 90 ab$^{-1}$ for future multi-TeV muon colliders. We perform a phenomenological study of the anomalous $WWγ$ couplings via the process $μ^+ μ^-\,\rightarrow\,μ^+γ^* μ^-\,\rightarrow\,μ^+\ell^-ν_\ell \barν_\ell$ using a model-independent analysis in the effective field theory framework at multi-TeV muon colliders. The sensitivity estimates obtained for the anomalous $WWγ$ couplings at systematic uncertainties of $δ_{sys}=0$, $3$, $5\%$ are compared with the experimental results. Our best sensitivity limits at 95$\%$ confidence level for $c_{WWW}/{Λ^2}$, $c_{\widetilde{W}WW}/Λ^2$, $c_{B}/{Λ^2}$, $c_{W}/{Λ^2}$ and $c_{\widetilde{W}}/Λ^2$ couplings are $[-0.030; 0.025]\,\text{TeV}^{-2}$, $[-0.014; 0.014]\,\text{TeV}^{-2}$, $[-0.185; 0.187]\,\text{TeV}^{-2}$, $[-0.187; 0.189]\,\text{TeV}^{-2}$ and $[-1.177; 1.097]\,\text{TeV}^{-2}$ at the multi-TeV muon collider with center-of-mass energy of 30 TeV and integrated luminosity of 90 ab$^{-1}$, respectively.

hep-ph↗

arXiv2023

Probe of the anomalous neutral triple gauge couplings in photon-induced collision at future muon colliders

The anomalous $ZZγ$ and $Zγγ$ neutral triple gauge couplings occurred by dimension-eight operators are investigated through the process $μ^+μ^-\,\rightarrow\,μ^+γ^*μ^-\,\rightarrow\,μ^+ Z(ν\barν)μ^-$ at the muon collider with $\sqrt{s}=3$, $6$, $10$ and $14$ TeV. The charged lepton pseudo-rapidity, the charged lepton transverse momentum and the transverse missing energy distributions are taken in consideration for the final state of the process in the analysis. The sensitivities of the anomalous couplings are obtained at $95\%$ Confidence Level with integrated luminosity of ${\cal L}_{\text{int}}=1$, $4$, $10$ and $20$ ab$^{-1}$, respectively, according to center-of-mass energies of muon collider taking into account the effects of systematic uncertainties $0\%$, $3\%$ and $5\%$. The best limits of anomalous $C_{BB}/{Λ^4}$, $C_{BW}/{Λ^4}$, $C_{\widetilde{B}W}/{Λ^4}$ and $C_{WW}/{Λ^4}$ couplings without systematic uncertainty at center-of-mass energy of 14 TeV and integrated luminosity of 20 ab$^{-1}$ are found to be [-0.01026; 0.00636] TeV$^{-4}$, [-0.02482; 0.03053] TeV$^{-4}$, [-0.01830; 0.02510] TeV$^{-4}$, [-0.06981; 0.07387] TeV$^{-4}$, respectively.

hep-ph↗

arXiv2022

Model-independent study on the anomalous $ZZγ$ and $Zγγ$ couplings at the future muon collider

In this study, we investigate the potential of $μ^{-} μ^{+}\to Zγ\to ν\barνγ$ process at the future muon collider with a center-of-mass energy of 3 TeV to examine the anomalous $ZZγ$ and $Zγγ$ neutral triple gauge couplings defining $CP$-conserving $C_{\widetilde{B}W}/{Λ^4}$ coupling and three $CP$-violating $C_{BB}/{Λ^4}$, $C_{BW}/{Λ^4}$, $C_{WW}/{Λ^4}$ 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 $μ^{-} μ^{+}\to Zγ\to ν\barνγ$ are $[-6.53;6.64]\times10^{-2}$ TeV$^{-4}$ on $CP$-conserving $C_{\widetilde{B}W}/{Λ^4}$ coupling and $[-2.47;2.47]\times10^{-2}$ TeV$^{-4}$, $[-8.46;8.46]\times10^{-2}$ TeV$^{-4}$ and $[-2.20;2.20]\times10^{-1}$ TeV$^{-4}$ on $CP$-conserving $C_{BB}/{Λ^4}$, $C_{BW}/{Λ^4}$, $C_{WW}/{Λ^4}$ 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.

hep-ph↗

arXiv2022

Search for the anomalous $ZZγ$ and $Zγγ$ couplings via $ννγ$ production at the CLIC

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 $ZZγ$ and $Zγγ$ neutral triple gauge couplings via the process $e^{-} e^{+}\to Zγ$ 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 $\sqrt{s}= 3$ TeV. The study focused on $CP$-conserving $C_{\widetilde{B}W}/{Λ^4}$ and $CP$-violating $C_{BB}/{Λ^4}$, $C_{BW}/{Λ^4}$, $C_{WW}/{Λ^4}$ 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 ${\cal L}_{\text{int}}=5$ $\rm ab^{-1}$, ${\cal L}_{\text{int}}=4$ $\rm ab^{-1}$ and ${\cal L}_{\text{int}}=1$ $\rm ab^{-1}$, 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.

hep-ph↗

arXiv2022

Sensitivity analysis for the anomalous $W^+W^-γ$ couplings at the LHeC and the FCC-he

We study the anomalous $W^+W^-γ$ couplings in performing the production of the W-pair through the process $e^- p\,\rightarrow\,e^-γ^*γ^* p\,\rightarrow\,e^-W^+W^-p$ at the Large Hadron electron Collider (LHeC) and the Future Circular Collider-hadron electron (FCC-he). We examine the pure hadronic, the semi-leptonic and the pure leptonic decay channels of the produced W-pair. We assume the center-of-mass energies of $\sqrt{s}=1.30$ and $1.98$ TeV and the integrated luminosities of 10-100 fb$^{-1}$ for the LHeC and the center-of-mass energies of $\sqrt{s}=3.46$ and $5.29$ TeV and the integrated luminosities of 100-2000 fb$^{-1}$ for the FCC-he. The best limits at 95$\%$ confidence level obtained for the anomalous couplings $Δκ_γ$ and $λ_γ$ are $Δκ_γ=[-0.00208; 0.00206]$ and $λ_γ=[-0.00174; 0.00834]$. By comparing these limits with the experimental limits, we present the potentials of the process and future $ep$ colliders.

hep-ph↗

arXiv2021

Search for the anomalous $WWγ$ couplings through the process $e^-e^+\,\rightarrow\,ν_e\barν_eγ$ at ILC with unpolarized and polarize beams

We investigate the anomalous $W^+W^-γ$ couplings through the process $e^-e^+\,\rightarrow\,ν_e\barν_eγ$ for unpolarized and polarized electron (positron) beams at the International Linear Collider. We give the 95$\%$ Confidence Level limits on the anomalous couplings with and without the systematic uncertainties for various values of center-of-mass energies and the integrated luminosities. We show that the obtained limits on the anomalous couplings through the process $e^-e^+\,\rightarrow\,ν_e\barν_eγ$ can highly improve the current experimental limits.

hep-ph↗

arXiv2020

Model independent study for the anomalous $W^+W^-γ$ couplings at the future lepton-hadron colliders

The triple gauge couplings are completely defined by the non-Abelian gauge nature of the Standard Model, precision measurements of these couplings at the present and future colliders in this way provide a substantial opportunity to test the gauge structure of the Standard Model. Also, measurements of these couplings are sensitive to new physics beyond the Standard Model. In this context, these couplings can be described by an effective Lagrangian. Here, we have studied the potential of the future $μp$ colliders on the anomalous $WWγ$ interactions via the subprocess $γ^* p\,\rightarrow\,W^-ν_μ$. This subprocess has been generated through the main process $μp\,\rightarrow\,μγ^* p\,\rightarrow\,W^-ν_μp$ at the LHC-$μp$, the FCC-$μp$ and the SPPC-$μp$. For these reasons, the total cross sections have been obtained as a function of the anomalous $WWγ$ couplings. Also, we have been calculated the best constraints on $c_{WWW}$, $c_{W}$ and $c_{B}$ parameters that define the anomalous $WWγ$ interactions.

hep-ph↗

arXiv2020

Photoproduction of mixed radions at a proton-proton collider

We investigate Higgs-radion mixing scenario through single radion photoproduction process $pp\to pγp\to pRqX$ at the LHC where $X$ represents the remnants of one of the initial protons. We consider high luminosity values of $L_{int}=200\;fb^{-1}$, $500\;fb^{-1}$ and $3000\;fb^{-1}$. We obtain bounds on the mixing parameter space by considering $R\to γγ$, $R\to W^+ W^-$ and $R\to ZZ$ decay channels of the radion as the signal. We also perform a similar analysis for a 100 TeV future proton-proton collider and compare its potential with that of LHC.

hep-ph↗