Search for charged lepton flavor violation of vector mesons in the U(1)_X SSM

2024/02/17 by Dong, Xing-Xing, Zhao, Shu-Min, Huo, Jia-Peng +3
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2402.11240

Abstract

Charged lepton flavor violation (CLFV) represents a clear new physics (NP) signal beyond the standard model (SM). In this work, we investigate the CLFV decays of vector mesons V→ l_i^±l_j^∓ with V∈\ϕ, J/Ψ, Υ(1S), Υ(2S),Υ(3S)\ in the U(1)_X SSM. Considering the SM-like Higgs boson mass within 3σ region, we discuss the corresponding constraints on the relevant parameter space of the model, which indicate this model can produce significant contributions to such CLFV decays. From the numerical analyses, the main sensitive parameters and CLFV sources originate from the non-diagonal elements correspond to the initial and final generations of the leptons. And the branching ratios to these CLFV processes can easily reach the present experimental upper bounds. Therefore, searching for CLFV processes of vector mesons may be an effective channel to study new physics.

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