The projections on ZZγ and Zγγ couplings via [formula omitted] production in HL-LHC and HE-LHC

A Senol,H Denizli,A Yilmaz,I Turk Cakir,O Cakir

doi:10.1016/j.physletb.2020.135255

A Senol, H Denizli + Show 3 more

Open Access

https://doi.org/10.1016/j.physletb.2020.135255

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Abstract

We investigate the sensitivity of the anomalous dimension-8 neutral triple gauge couplings via process pp→ννγ 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 CB˜W/Λ4, CBB/Λ4, CWW/Λ4 and CBW/Λ4 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 CB˜W/Λ4, CBB/Λ4, CWW/Λ4 and CBW/Λ4 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.

Highlights

The Standard Model (SM) is a successful theory at describing the particle physics phenomena in reachable energy limits of current collider experiments
In this analysis we focus on CP-conserving CBW /Λ4 and CP-violating CBB/Λ4, CW W /Λ4,CBW /Λ4 couplings via pp → ννγ process in other post LHC considerations, namely High Luminosity LHC (HL-LHC) and High Energy LHC (HE-LHC) including pile-up effects
We focused on the pp → ννγ process to search for effects of the dimension-8 anomalous Zγγ and ZZγ operators at proposed future post LHC experiments, HL-LHC and HE-LHC

Summary

INTRODUCTION

The Standard Model (SM) is a successful theory at describing the particle physics phenomena in reachable energy limits of current collider experiments. The constraints on dimension eight operatos in the pp → llγ and pp → ννγ processes have been studied for a 100 TeV center of mass energy collider (FCC-hh) [6] In this analysis we focus on CP-conserving CBW /Λ4 and CP-violating CBB/Λ4, CW W /Λ4,CBW /Λ4 couplings via pp → ννγ process in other post LHC considerations, namely HL-LHC and HE-LHC including pile-up effects. We will consider CBW , CBB, CBW and CWW couplings in the detailed analysis including detector and pile-up effects through ννγ production at HL-LHC and HE-LHC with 14 TeV and 27 TeV center of mass energy

SIGNAL AND BACKGROUND ANALYSIS

RESULTS

CONCLUSIONS