Charming loops in exclusive rare FCNC $B$-decays

Abstract

Rare $B$-decays induced by flavour-changing neutral currents (FCNC) is one of the promising candidates for probing physics beyond the Standard model. However, for identifying potential new physics from the data, reliable control over QCD contributions is necessary. We focus on one of such QCD contributions - the charming loops - that potentially can lead to difficulties in disentangling new physics effects from the observables and discuss the possibility to gain control over theoretical predictions for charming loops.

arXiv comment15 pages, Plenary talk at the XXIV International Workshop "High Energy Physics and Quantum Field Theory" (QFTHEP2019) September 22-29, 2019, Sochi, Russia

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• Weak Decays Beyond Leading Logarithms
• Effective Hamiltonian for $B \ra X_s e^+ e^-$ Beyond Leading Logarithms in the NDR and HV Schemes
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• Comment on nonperturbative effects in $B\to X_s\gamma$
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Cited by in corpus (7)

• Non-local matrix elements in $B_{(s)}\to \{K^{(\ast )},\varphi \}{\ell }^{+}{\ell }^{-}$
• Lessons from the $B^{0,+}\to K^{\ast 0,+}{\mu }^{+}{\mu }^{-}$ angular analyses
• Non-factorizable charming loops in FCNC B decays vs B-decay semileptonic form factors
• Three-particle distribution in B meson and charm-quark loops in FCNC B decays
• Constraints on the anomalous $Wtb$ couplings from $B$-physics experiments
• Charming-loop contribution to $B_s\to \gamma \gamma$ decay
• Factorization of multiparticle contributions to amplitudes of B-meson weak decays