W-Boson Exotic Decay into Three Charged Leptons at the LHC

2024/07/22 by Fei, Yifan, Li, Peiran, Liu, Zhen +2 · 1 citation
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2407.15930

Abstract

We investigate the W boson's exotic decay channel, W → ℓℓℓ ν, at the LHC. Although the four-body final states suppress the decay branching ratio, the large production of W bosons makes detecting and precisely measuring this decay probability entirely feasible. Our simulation study indicates that this tiny branching ratio can be measured with sub-percent precision at the HL-LHC. This decay channel can also constrain Standard Model extensions. Using the L_μ-L_τ model as a benchmark, we find that the current bound on the gauge coupling for Z' mass in the range of [4,75] GeV can significantly improve.

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