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arXiv · hep-ph/9811396

CP Violation in the Semileptonic $B_{l4}$ ($B->D πl ν$) Decays: Multi-Higgs Doublet Model and Scalar-Leptoquark Models

C. S. Kim·Jake Lee·W. Namgung
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Abstract

CP violation from physics beyond the Standard Model is investigated in $B_{l4}$ decays: $B\to Dπl\barν_l$. In the decay process, we include various excited states as intermediate states decaying to the final hadrons, $D+π$. We consider the semileptonic decay to a tau lepton family as well. The CP violation is implemented through complex scalar--fermion couplings in the multi-Higgs doublet model and scalar-leptoquark models beyond the Standard Model. With these complex couplings, we calculate the CP-odd rate asymmetry and the optimal asymmetry. We find that for $B_{τ4}$ decays the optimal asymmetry is sizable and can be detected at $1σ$ level with about $10^6$-$10^7$ $B$-meson pairs, for maximally-allowed values of CP-odd parameters in those extended models.

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C. S. Kim, Jake Lee, W. Namgung. 1998-11-19. CP Violation in the Semileptonic $B_{l4}$ ($B->D πl ν$) Decays: Multi-Higgs Doublet Model and Scalar-Leptoquark Models. https://doi.org/10.1103/physrevd.59.114006

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