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Register a new userStudy on Anomalous Neutral Triple Gauge Boson Couplings from Dimension-eight Operators at the HL-LHC
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A. Senol
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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.
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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.
In these proceedings I explore one aspect of gauge-boson physics at the LHC - Triple Gauge-boson Couplings (TGCs) in $WZ$ and Wgamma production. Methods for extracting confidence limits on anomalous TGCs are assessed, while accounting for the effects of higher order QCD corrections and contributions from other theoretical and detector related systematics. Detector response has been parametrised according to the ATLAS detectors specifications. A strategy for reporting the anomalous coupling limits is introduced which removes the ambiguities of form factors by reporting the limits as a function of a cutoff operating on the diboson system invariant mass. Techniques for measuring the energy dependence of anomalous couplings are demonstrated.
We present the results obtained by the Triple Gauge Couplings working group during the LEP2 Workshop (1994-1995). The report concentrates on the measurement of $WWgamma$ and $WWZ$ couplings in $e^-e^+to W^-W^+$ or, more generally, four-fermion production at LEP2. In addition the detection of new interactions in the bosonic sector via other production channels is discussed.
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.
The measurement of anomalous gauge boson self couplings is reviewed for a variety of present and planned accelerators. Sensitivities are compared for these accelerators using models based on the effective Lagrangian approach. The sensitivities described here are for measurement of generic parameters kappa_v, lambda_v, etc., defined in the text. Pre-LHC measurements will not probe these couplings to precision better than O(1/10). The LHC should be sensitive to better than O(1/100), while a future NLC should achieve sensitivity of O(1/1000) to O(1/10000) for center of mass energies ranging from 0.5 to 1.5 TeV.
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