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We make a correlative study of B anomalies and fermionic dark matter in a \(U(1)_{L_e-L_\mu }\) gauge extension of the Standard model. With three heavy neutral fermions and scalar doublet leptoquark \(\tilde{R}_2\) , we realize the \(b\rightarrow s\) transition. We then focus on the dark matter relic density and direct detection cross-section in scalar and gauge portals. The new physics contribution for \(b \rightarrow s\) transition comes from penguin diagrams with \(Z^\prime \) , leptoquark, and new fermions. We then constrain the model parameter space from the dark sector and observables such as Br( \(B_s \rightarrow \phi , K^{(*)}) \mu \mu \) and \(P_5^{\prime }\) processes. Utilizing the allowed parameter space consistent with both sectors, we discuss the impact on several observables such as the branching ratio, and lepton non-universality parameter of \(\Lambda _b \rightarrow \Lambda ^* (1520) (\rightarrow pK) \ell \ell \) process.

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Connecting the  \(b \rightarrow s \ell \ell \) Decays with Dark Sector in the Light of Scalar Leptoquark \(\tilde{R}_{2}\)

  • 会议论文

  • 发表日期：

    2025年

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  • Dhiren Panda,
  • Manas Kumar Mohapatra,
  • Shivaramakrishna Singirala,
  • Rukmani Mohanta

摘要

We make a correlative study of B anomalies and fermionic dark matter in a \(U(1)_{L_e-L_\mu }\) gauge extension of the Standard model. With three heavy neutral fermions and scalar doublet leptoquark \(\tilde{R}_2\) , we realize the \(b\rightarrow s\) transition. We then focus on the dark matter relic density and direct detection cross-section in scalar and gauge portals. The new physics contribution for \(b \rightarrow s\) transition comes from penguin diagrams with \(Z^\prime \) , leptoquark, and new fermions. We then constrain the model parameter space from the dark sector and observables such as Br( \(B_s \rightarrow \phi , K^{(*)}) \mu \mu \) and \(P_5^{\prime }\) processes. Utilizing the allowed parameter space consistent with both sectors, we discuss the impact on several observables such as the branching ratio, and lepton non-universality parameter of \(\Lambda _b \rightarrow \Lambda ^* (1520) (\rightarrow pK) \ell \ell \) process.