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- W3014781373 abstract "We analyze patterns from $CP$--violating new physics (NP) in hadronic and semileptonic rare charm $|mathrm{ensuremath{Delta}}c|=|mathrm{ensuremath{Delta}}u|=1$ transitions. Observation of direct $CP$ violation in hadronic decays, as in $mathrm{ensuremath{Delta}}{A}_{CP}$, provides opportunities for $censuremath{rightarrow}u{ensuremath{ell}}^{+}{ensuremath{ell}}^{ensuremath{-}}$, $ensuremath{ell}=e,ensuremath{mu}$ transitions, and vice versa. For the concrete case of flavorful, anomalyfree ${Z}^{ensuremath{'}}$--models a NP--interpretation of $mathrm{ensuremath{Delta}}{A}_{CP}$ suggests measurable $CP$ asymmetries in semileptonic decays such as $Densuremath{rightarrow}ensuremath{pi}{ensuremath{ell}}^{+}{ensuremath{ell}}^{ensuremath{-}}$ or $Densuremath{rightarrow}ensuremath{pi}ensuremath{pi}{ensuremath{ell}}^{+}{ensuremath{ell}}^{ensuremath{-}}$. Conversely, an observation of $CP$ violation in $censuremath{rightarrow}u{e}^{+}{e}^{ensuremath{-}}$ or $censuremath{rightarrow}u{ensuremath{mu}}^{+}{ensuremath{mu}}^{ensuremath{-}}$ decays supports a NP--interpretation of $mathrm{ensuremath{Delta}}{A}_{CP}$. Flavorful $U(1{)}^{ensuremath{'}}$--extensions provide explicit U--spin and isospin breaking which can be probed in patterns of hadronic decays of charm mesons. We work out signatures for $CP$ asymmetries in ${D}^{0}ensuremath{rightarrow}{ensuremath{pi}}^{+}{ensuremath{pi}}^{ensuremath{-}}$, ${D}^{0}ensuremath{rightarrow}{K}^{+}{K}^{ensuremath{-}}$ and ${D}^{0}ensuremath{rightarrow}{ensuremath{pi}}^{0}{ensuremath{pi}}^{0}$, ${D}^{+}ensuremath{rightarrow}{ensuremath{pi}}^{+}{ensuremath{pi}}^{0}$ decays, which can be probed in the future at LHCb and Belle II and provide further informative cross checks." @default.
- W3014781373 created "2020-04-10" @default.
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- W3014781373 date "2020-06-03" @default.
- W3014781373 modified "2023-10-02" @default.
- W3014781373 title "Exploiting <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetries in rare charm decays" @default.
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- W3014781373 doi "https://doi.org/10.1103/physrevd.101.115006" @default.
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