Correlating the CDF W-mass shift with the muon g-2 and the b → s ℓ⁺ ℓ^- transitions

2023/07/11 by Xin-Qiang Li, Li, Xin-Qiang, Zejun Xie +5
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena

paper · pdf · doi:10.48550/arxiv.2307.05290

Abstract

Motivated by the latest CDF W-mass measurement as well as the muon g-2 anomaly and the discrepancies observed in b → s ℓ⁺ ℓ^- transitions, we propose an extension of the Standard Model (SM) with the SU(2)_L-singlet vector-like fermion partners that are featured by additional U(1)^′ gauge symmetry. The fermion partners have the same SM quantum numbers as of the right-handed SM fermions, and can therefore mix with the latter after the electroweak and the U(1)^′ symmetry breaking. As a result, desirable loop-level corrections to the (g-2)_μ, the W-boson mass m_W and the Wilson coefficient C₉ in b → s μ⁺ μ^- transitions can be obtained. The final allowed parameter space is also consistent with the constraints from the Z → μ⁺ μ^- decay, the neutrino trident production and the LHC direct searches for the vector-like quarks and leptons.

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