The projections on $ZZ\gamma$ and $Z\gamma \gamma$ couplings via $\nu \bar{\nu }\gamma$ production in HL-LHC and HE-LHC

Abstract

We investigate the sensitivity of the anomalous dimension-8 neutral triple gauge couplings via process $pp\to \nu \nu \gamma$ with fast detector simulation including pile-up effects for the post LHC experiments. The transverse momentum of the final state photon and missing energy transverse distributions are considered in the analysis. We obtain the sensitivity to the $C_{\tilde{B}W}/{\Lambda }^4$, $C_{BB}/{\Lambda }^4$, $C_{WW}/{\Lambda }^4$ and $C_{BW}/{\Lambda }^4$ couplings at HL-LHC and HE-LHC with an integrated luminosity of 3 ab${}^{-1}$ and 15 ab${}^{-1}$, respectively. Finally, our numerical results show that one can reach the constraints at 95\% confidence level without systematic error on $C_{\tilde{B}W}/{\Lambda }^4$, $C_{BB}/{\Lambda }^4$, $C_{WW}/{\Lambda }^4$ and $C_{BW}/{\Lambda }^4$ couplings for HL-LHC (HE-LHC) as [-0.38;0.38] ([-0.12;0.12]), [-0.21;0.21]([-0.085;0.085]), [-1.08;1.08]([-0.38;0.38]) and [-0.48;0.48]([-0.25;0.25]), respectively. They are better than the experimental limits obtained by LHC.

Comments: 11 pages, 7 figures, final version to appear in Phys.Lett.B