Anomalous triple gauge couplings in electroweak dilepton tails at the LHC and interference resurrection

Haeyun Hwang, Ui Min, Junghyeon Park, Minho Son, Jae Hyeok Yoo

Research output: Contribution to journalArticlepeer-review


We study the electroweak dilepton production with two forward jets at the LHC, aiming to measure the anomalous triple gauge couplings in the Effective Field Theory (EFT) approach. This process exhibits a distinctive feature, namely, the interference between Standard Model (SM) and beyond the SM is resurrected in the inclusive cross section of the full amplitude, including two forward jets. As a concrete illustration, we perform the detailed analytic and numerical study of the interference using a simpler toy process, and discuss the subtlety of the effective W approximation. We propose a new kinematic variable, VBFhardness, that controls the amount of energy flowing into the dilepton subprocess. We show that an appropriate cut on VBFhardness makes the interference resurrection manifest. Finally, we use the invariant mass of the dilepton system as well as the transverse momentum, as done in the literature, to derive the sensitivity to anomalous triple gauge couplings at the LHC and the high luminosity LHC. Our result is compared with the existing limits from the experiments.

Original languageEnglish
Article number69
JournalJournal of High Energy Physics
Issue number8
Publication statusPublished - 2023 Aug

Bibliographical note

Funding Information:
MS thanks A. Azatov and D. Marzocca for valuable discussions. Especially, MS thanks A. Azatov for the explanation of his previous work regarding the interference resurection. JP, MS, and MU were supported by National Research Foundation of Korea under Grant Number NRF-2021R1A2C1095430. JY and HH were supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1005916).

Publisher Copyright:
© 2023, The Author(s).


  • Electroweak Precision Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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