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In this study, we investigate the new physics effects in semileptonic decay \(\bar{B}_s \rightarrow K^{*+}(\rightarrow K \pi ) l^- \bar{\nu }_l\) which is induced by the \(b \rightarrow u l\nu \) quark level transition. This decay process serves as an important probe for testing the Standard Model predictions and searching deviations that might indicate new physics. The new physics wilson coefficients are constrained by using the available experimental branching ratio measurements of leptonic decay \(B \rightarrow \mu \nu \) and semileptonic decays \(B \rightarrow (\pi , \rho , \omega )l\nu \) . We provide \(q^2\) dependence of branching ratio, forward-backward asymmetry and longitudinal polarization of \(K^*\) meson for the allowed new physics parameters.

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Sensitivity of  \(\bar{B_s} \rightarrow K^{*+}(\rightarrow K\pi ) l^- \bar{\nu }_l\) Semileptonic Decay Towards New Physics

  • 会议论文

  • 发表日期：

    2025年

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  • Shabana Khan,
  • Dinesh Kumar

摘要

In this study, we investigate the new physics effects in semileptonic decay \(\bar{B}_s \rightarrow K^{*+}(\rightarrow K \pi ) l^- \bar{\nu }_l\) which is induced by the \(b \rightarrow u l\nu \) quark level transition. This decay process serves as an important probe for testing the Standard Model predictions and searching deviations that might indicate new physics. The new physics wilson coefficients are constrained by using the available experimental branching ratio measurements of leptonic decay \(B \rightarrow \mu \nu \) and semileptonic decays \(B \rightarrow (\pi , \rho , \omega )l\nu \) . We provide \(q^2\) dependence of branching ratio, forward-backward asymmetry and longitudinal polarization of \(K^*\) meson for the allowed new physics parameters.