Direct probes of flavor-changing neutral currents in $e^{+}{e}^{-}$ collisions

Abstract

We propose a novel method to study flavor-changing neutral currents in the $e^{+}{e}^{-}\to D^{\ast 0}$ and $e^{+}{e}^{-}\to B_s^{\ast }$ transitions, tuning the energy of $e^{+}{e}^{-}$- collisions to the mass of the narrow vector resonance $D^{\ast 0}$ or $B_s^{\ast }$. We present a thorough study of both short-distance and long-distance contributions to $e^{+}{e}^{-}\to D^{\ast 0}$ in the Standard Model and investigate possible contributions of new physics in the charm sector. This process, albeit very rare, has clear advantages with respect to the $D^0\to e^{+}{e}^{-}$ decay: the helicity suppression is absent, and a richer set of effective operators can be probed. Implications of the same proposal for $B_s^{\ast }$ are also discussed.

24 pages, 2 figures

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• Charm Meson Decays
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• Relating D0-anti-D0 Mixing and D0 -> l+l- with New Physics
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• Weak decays of unstable $b$-mesons
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• D^0 -> gamma gamma and D^0 -> mu^+ mu^- Rates on an Unlikely Impact of the Littlest Higgs Model with T-Parity

Cited by in corpus (17)

• Charm Physics Confronts High-$p_T$ Lepton Tails
• Lepton flavor violating quarkonium decays
• Indirect constraints on lepton-flavour-violating quarkonium decays
• Study of the rare decays $B_{s,d}^{\ast }\to {\mu }^{+}{\mu }^{-}$
• Model independent analysis of $B^{\ast }\to P\ell {\bar{\nu }}_{\ell }$ decay processes
• Semi-leptonic decays of $B^{\ast }$, $B_s^{\ast }$, and $B_c^{\ast }$ with the Bethe-Salpeter method
• Probing new physics through $B_s^{\ast }\to {\mu }^{+}{\mu }^{-}$ decay
• Radiative lepton flavor violating B, D, and K decays
• Study of the rare decays $B_{(}s,d{)}^{\ast }$ arrow $l^{+}{l}^{-}$ in Z' model
• $B_{s,d}^{\ast }\to {\mu }^{+}{\mu }^{-}$ and its impact on $B_{s,d}\to {\mu }^{+}{\mu }^{-}$
• Prospects for studies of $D^{\ast 0}\to {\mu }^{+}{\mu }^{-}$ and $B_{(s)}^{\ast 0}\to {\mu }^{+}{\mu }^{-}$ decays
• The lepton flavor violating decays of vector mesons in the MRSSM
• Lepton polarization asymmetry in $B_{(}s,d{)}^{\ast }$ arrow ${\mu }^{+}{\mu }^{-}$ with new Z' couplings
• Search for $B_c^{+}\to {\pi }^{+}{\mu }^{+}{\mu }^{-}$ decays and measurement of the branching fraction ratio $\mathcal{B}(B_c^{+}\to \psi (2S){\pi }^{+})/\mathcal{B}(B_c^{+}\to J/\psi {\pi }^{+})$
• Search for $B_{(s)}^{\ast 0}\to {\mu }^{+}{\mu }^{-}$ in $B_c^{+}\to {\pi }^{+}{\mu }^{+}{\mu }^{-}$ decays
• QCD calculations of radiative heavy meson decays with subleading power corrections
• Lepton flavor violating meson decays