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

Abstract

In this paper, a study is carried out on the e − p → e − γ * p → pW + γν e production to probe quartic W + W − γγ couplings using 10, 100 fb −1 of e − p collisions data at √ s= 1.30, 1.98 GeV at the Large Hadron electron Collider (LHeC) and 100, 1000 fb −1 with √ s= 3.46, 5.29 GeV at the Future Circular Collider-hadron electron (FCC-he). Production cross-sections are determined for both at leptonic and hadronic decay channel 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 /Λ 4 and f T,i /Λ 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 → e − γ * p → pW + γν e in e − p collisions offers a window for study the quartic W + W − γγ electroweak bosons couplings at the LHeC and the FCC-he, which provides a much cleaner collision environment than the LHC.

Probing anomalous quartic $γγγγ$ couplings in light-by-light collisions at the CLIC

“…Recently, the LHC experimental bounds on QGCs have been presented by the CMS [25] and ATLAS [26] Collaborations. In a number of theoretical papers, search limits for the QGCs at future electron-proton colliders have been estimated [27]- [29]. The anomalous QGCs can be also probed at linear e + e − colliders [30], in particluar, in the eγ mode [31,32] or γγ mode [33]- [34].…”