B → X_s l⁺ l^- in the μ from ν Supersymmetric Standard Model

2026/07/16 by Xiao-Jie Hu, Hai-Bin Zhang, Tai-Fu Feng
#hep-ph

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Abstract

We investigate the impact of new physics on the rare inclusive decay B → X_s l⁺ l^- within the framework of the μ from ν Supersymmetric Standard Model (μνSSM). The dominant contributions to the relevant Wilson coefficients and their corresponding particles are identified and analyzed. By performing a systematic scan over the relevant parameter space, we elucidate the underlying physical mechanisms governing these dominant contributions and demonstrate their consistency with the experimentally allowed regions. Experimental constraints from the decays B → X_sγ, B_s⁰ → μ⁺ μ^-, and the 125 GeV SM-like Higgs boson are also incorporated. We perform a systematic interference decomposition of the Wilson-coefficient contributions to the forward-backward asymmetry, identifying the C₇C₁₀ and C₉C₁₀ interference terms as the dominant contributions governing its behavior in both the low- and high-q² regions.

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