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Register a new userSensitivity on Anomalous Neutral Triple Gauge Couplings via $ZZ$ Production at FCC-hh
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We study the sensitivity of anomalous neutral triple gauge couplings ($aNTGC$) via $pp rightarrow ZZ$ production in the 4$ell$ channel at 100 TeV centre of mass energy of future circular hadron collider, verbFCC-hh. The analysis including the realistic detector effects is performed in the mode where both Z bosons decay into same flavor, oppositely charged lepton pairs. The sensitivities to the charge-parity (CP)-conserving $C_{tilde{B}W} / Lambda^{4}$ and CP-violating $C_{WW} / Lambda^{4}$, $C_{BW} / Lambda^{4}$ and $C_{BB} / Lambda^{4}$ couplings obtained at 95% Confidence Level (C.L.) using the invariant mass distribution of 4$ell$ system reconstructing the leading and sub-leading Z boson candidates are $[-0.117, ,, +0.117]$, $[-0.293, ,, +0.292]$, $[-0.380, ,, +0.379]$, and $[-0.138, ,, +0.138]$ in the unit of TeV$^{-4}$, respectively.
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This paper presents the projections on the anomalous neutral triple gauge couplings ($aNTGC$) via $pp rightarrow ZZ$ production in the 2$ell$2$ u$ final state at a 100 TeV proton-proton collider, verbFCC-hh. %100 TeV center of mass energy of The realistic verbFCC-hh detector environments and its effects taken into account in the analysis. The study is carried out in the mode where one Z boson decays into a pair of same-flavor, opposite-sign leptons (electrons or muons) and the other one decays to the two neutrinos. The new bounds on the charge-parity (CP)-conserving couplings $C_{widetilde{B}W} / Lambda^{4}$ and CP-violating couplings $C_{WW} / Lambda^{4}$, $C_{BW} / Lambda^{4}$ and $C_{BB} / Lambda^{4}$ achived at 95% Confidence Level (C.L.) using the transverse momentum of the dilepton system ($p_{T}^{ell ell}$) are $[-, 0.042, ,, +,0.042]$, $[-,0.050, ,, +,0.050]$, $[-,0.050, ,, +,0.050]$, and $[-,0.048, ,, +,0.048]$ in units of TeV$^{-4}$, respectively.
The effects of dimension-eight operators giving rise to anomalous neutral triple gauge boson interactions of $Zgammagamma$ and $Zgamma Z$ vertices in $ppto l^-l^+gamma$ and $ppto ubar u gamma$ are investigated at 100 TeV centre of mass energy of future circular hadron collider (FCC-hh). The transverse momentum of photon, invariant mass of $l^-l^+gamma$ and angular distribution of charged lepton in the rest frame of $l^-l^+$ and Missing Energy Transverse (MET) are considered in the analysis. The realistic detector effects are also included with Delphes simulation. Sensitivity limits obtained at 95% C.L. for $C_{widetilde B W}/Lambda^4$ and $C_{B B}/Lambda^4$ couplings are $[-0.52;0.52] ([-0.40;0.40])$ TeV$^{-4}$, $[-0.43;0.43] ([-0.33;0.33])$ TeV$^{-4}$ in the dilepton+photon channel and $[-0.11;0.11] ([-0.084;0.084])$ TeV$^{-4}$, $[-0.092;0.092] ([-0.072;0.072])$ TeV$^{-4}$ in the MET+photon channel with $L_{int}$=1 (3) ab$^{-1}$, respectively.
We study the anomalous FCNC $tqgamma$ and $tqg$ couplings via $ppto Wbgamma+X$ signal process including realistic detector effects for both leptonic and hadronic decay channels of the W boson at 100 TeV FCC-hh. The relevant background are considered in the cut based analysis to obtain not only limits on the anomalous $lambda$ and $zeta$ couplings but also branching ratios of $tto qgamma$ and $tto qg$ decay channels. We find that the sensitivity to the branching ratio of $t to q gamma$ channel is three order better than the available LHC experimental limits, and it is comparable for the branching ratio of the $tto qg$ decay channel with an integrated luminosity of 10 ab$^{-1}$ at 2$sigma$ significance level.
The anomalous neutral triple gauge boson couplings (aNTGCs) for the Z gamma gamma and Z gamma Z vertices described by dimension-eight operators are examined through the process pp to l^{+}l^{-} gamma at the High-Luminosity Large Hadron Collider (HL-LHC). We performed an analysis on transverse momentum of photon and angular distribution of charged lepton in the final state including detector effects. Sensitivity limits of the C_{widetilde{B}W}, C_{BB} couplings are obtained at 95 % C.L. to constrain for the range [-1.88: 1.88] TeV^{-4}, [-1.47: 1.47] TeV^{-4} and [-1.14:1.14] TeV^{-4}, [-0.86: 0.86] TeV^{-4} with an integrated luminosity of 300 fb^{-1} and 3000 fb^{-1}, respectively.
The vector boson scattering at the Large Hadron Collider (LHC) is sensitive to anomalous quartic gauge couplings (aQGCs). In this paper, we investigate the aQGC contribution to $ W gamma jj$ production at the LHC with $sqrt{s}=13$ TeV in the context of an effective field theory (EFT). The unitarity bound is applied as a cut on the energy scale of this production process, which is found to have significant suppressive effects on the signals. To enhance the statistical significance, we analyse the kinematic and polarization features of the aQGC signals in detail. We find that the polarization effects induced by the aQGCs are unique and can discriminate the signals from the SM backgrounds well. With the proposed event selection strategy, we obtain the constraints on the coefficients of dimension-8 operators with current luminosity. The results indicate that the process $pp to W gamma jj$ is powerful for searching for the $O_{M_{2,3,4,5}}$ and $O_{T_{5,6,7}}$ operators.
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