Abstract
The effects of dimension-eight operators giving rise to anomalous neutral triple gauge boson interactions of Zγγ and ZγZ vertices in pp→l−l+γ and pp→νν¯γ are investigated at 100 TeV center of mass energy of future circular hadron collider (FCC-hh). The transverse momentum of photon, invariant mass of l−l+γ 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 CB˜W/Λ4 and CBB/Λ4 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 Lint=1 (3) ab−1, respectively.
Highlights
The gauge boson self-interactions represented by the non-Abelian SU(2)L × U(1)Y gauge group of the electroweak sector in the Standard Model (SM) are of great interest since it provides valuable information to test the predictions at the TeV energy scale
We present numerical results taking into account systematic errors, δsys = 5% and δsys = 10% for pγT > 400 GeV at an integrated luminosity of 1 ab−1
We have investigated the effects of dimension-eight operators giving rise to anomalous neutral triple gauge boson interactions of Zγγ and ZγZ vertices in l−l+γ and ννγ production at Future Circular Collider (FCC)-hh
Summary
The gauge boson self-interactions represented by the non-Abelian SU(2)L × U(1)Y gauge group of the electroweak sector in the Standard Model (SM) are of great interest since it provides valuable information to test the predictions at the TeV energy scale. The triple couplings between the photon and Z boson (Zγγ and ZγZ) vanish at tree level in the SM. The following convention in the definitions of the operators are used: Wμν = σI (∂μWνI − ∂ν WμI + gǫIJK WμJ WνK ) The coefficients of these four dimension-eight operators describing anomalous Neutral Triple. Gauge Couplings (aNTGC) are CP-conserving CBW and CP-violating CBB, CBW , CW W They are related to dimension-six operators aNTGC as described in Ref. The production of Z boson in association with a high energy photon is studied in the Z → ννchannel at √s = 13 TeV with an integrated luminosity of 36.1 fb−1 by the ATLAS collaboration and set limits on the EFT parameters at the 95% C.L. as follows [10]. We give details of the simulation and discuss for the determination of the limits on the dimension-eight Zγγ and ZZγ couplings at 95% C.L
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