Nonfactorizable charming loops in FCNC 
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 decays versus 
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-decay semileptonic form factors

Melikhov, Dmitri

doi:10.1103/physrevd.106.054022

Phys. Rev. D

2022

DOI: 10.1103/physrevd.106.054022

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Nonfactorizable charming loops in FCNC B decays versus B -decay semileptonic form factors

Dmitri Melikhov

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Cited by 6 publications

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Non-factorisable effects in the decays $$ {\overline{B}}_s^0\to {D}_s^{+}{\pi}^{-} $$ and $$ {\overline{B}}^0\to {D}^{+}{K}^{-} $$ from LCSR

Piscopo,

Rusov

2023

J. High Energ. Phys.

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In light of the current discrepancies between the recent predictions based on QCD factorisation (QCDF) and the experimental data for several non-leptonic colour-allowed two-body B-meson decays, we obtain new determinations of the non-factorisable soft-gluon contribution to the decays $$ {\overline{B}}_s^0\to {D}_s^{+}{\pi}^{-} $$ B ¯ s 0 → D s + π − and $$ {\overline{B}}^0\to {D}^{+}{K}^{-} $$ B ¯ 0 → D + K − , using the framework of light-cone sum rule (LCSR), with a suitable three-point correlation function and B-meson light-cone distribution amplitudes. In particular, we discuss the problem associated with a double light-cone (LC) expansion of the correlator, and motivate future determinations of the three-particle B-meson matrix element with the gluon and the spectator quark aligned along different light-cone directions. Performing a LC-local operator product expansion of the correlation function, we find, for both modes considered, the non-factorisable part of the amplitude to be sizeable and positive, however, with very large systematic uncertainties. Furthermore, we also determine for the first time, using LCSR, the factorisable amplitudes at LO-QCD, and thus the corresponding branching fractions. Our predictions are in agreement with the experimental data and consistent with the results based on QCDF, although again within very large uncertainties. In this respect, we provide a rich outlook for future improvements and investigations.

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Non-factorisable effects in the decays $$ {\overline{B}}_s^0\to {D}_s^{+}{\pi}^{-} $$ and $$ {\overline{B}}^0\to {D}^{+}{K}^{-} $$ from LCSR

Piscopo,

Rusov

2023

J. High Energ. Phys.

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show abstract

Constraints on lepton universality violation from rare B decays

et al. 2023

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Three-particle distribution in the B meson and charm-quark loops in FCNC B decays

Melikhov

2023

Phys. Rev. D

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Nonfactorizable charming loops in FCNC B decays versus B -decay semileptonic form factors

Cited by 6 publications

References 25 publications

Non-factorisable effects in the decays $$ {\overline{B}}_s^0\to {D}_s^{+}{\pi}^{-} $$ and $$ {\overline{B}}^0\to {D}^{+}{K}^{-} $$ from LCSR

Non-factorisable effects in the decays $$ {\overline{B}}_s^0\to {D}_s^{+}{\pi}^{-} $$ and $$ {\overline{B}}^0\to {D}^{+}{K}^{-} $$ from LCSR

Constraints on lepton universality violation from rare B decays

Three-particle distribution in the B meson and charm-quark loops in FCNC B decays

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