Study on the anomalous quartic W^+W^-gamma gamma couplings of electroweak bosons in e^-p collisions at the LHeC and the FCC-he

A Gutiérrez-Rodríguez,M Köksal,E Gurkanli,V Ari,M A Hernández-Ruíz

doi:10.1140/epjc/s10052-021-08991-3

Abstract

In this paper, a study is carried out on the e^-p rightarrow e^-gamma ^* p rightarrow p W^-gamma nu _e production to probe quartic W^+W^-gamma gamma couplings at the Large Hadron electron Collider (LHeC) with sqrt{s}= 1.30, 1.98,hbox {TeV} and at the Future Circular Collider-hadron electron (FCC-he) with sqrt{s}= 3.46, 5.29,hbox {TeV}. Production cross-sections are determined for both at leptonic and hadronic decay channels of the W-boson. With the data from future e^-p colliders, it is possible to obtain sensitivity measures at 95% C.L. on the anomalous f_ {M,i}/Lambda ^4 and f_ {T,j}/Lambda ^4 couplings which are competitive with the limits obtained by the LHC, as well as with others limits reported in the literature. The production mode e^-p rightarrow e^-gamma ^* p rightarrow p W^-gamma nu _e in e^-p collisions offers a window for study the quartic W^+W^-gamma gamma electroweak bosons couplings at the LHeC and the FCC-he, which provides a much cleaner collision environment than the LHC.

Highlights

Gauge Couplings (TGC) and the Quartic Gauge Couplings (QGC)
A direct comparison of the results shown in Tables 4 and 5 for the total cross-section of the process e− p → e−γ ∗ p → pW −γ νe projected by
It is worth mentioning that our results show that a nonzero anomalous QGC (aQGC) enhances the production crosssection at large energies of the e− p system with respect to the Standard Model (SM) prediction as can be seen in Figs. 3, 4, 5, 6, 7, 8, 9 and 10

Summary

Introduction

Gauge Couplings (TGC) and the Quartic Gauge Couplings (QGC). While the anomalous TGC (aTGC) and the anomalous QGC (aQGC) are deviations from the SM. Study of anomalous W W γ γ couplings sensitivity is the main topic in this article For this purpose, we use the effective Lagrangian formalism which has been utilized extensively for parameterizing new physics BSM in many processes of particle physics. Starting from our present theoretical, phenomenological and experimental understanding, treating the SM in an effective Lagrangian approach is a well-motivated starting point since we have no present evidence of BSM physics This means defining a scale, , of new physics higher than the energy scale being probed in the experiment and using the fields of the SM to write higher dimension operators in addition to dimension-4 operators of the SM. C and P conserving non-linear effective Lagrangian for W W γ γ aQGC that define dimension-6 operators is described as follows: L0.

Photoproduction at the LHeC and the FCC-he

X X γγγγ

GeV 2 is the maximum virtuality of the photon and Q2min is:

Summary and conclusions