form factors in HQEFT and model independent analysis of relevant semileptonic decays with NP effects*

Zuo, Ya-Bing; Jin, Hongyao; Tian, Jingying; Yang, Jia; Pan, Tingting; Gong, Hanyu

doi:10.1088/1674-1137/ace821

Cited by 1 publication

(1 citation statement)

References 29 publications

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“…We find agreement between our results for the B s → D * s0 ℓν branching ratio and the results of ref. [34], which were obtained with QCD sum rules in the framework of heavy quark effective field theory. There are no measurements or other theoretical predictions for the JHEP12(2023)015 observables in the decays of scenario 2.…”

Section: Jhep12(2023)015mentioning

confidence: 99%

$$ B\to {D}_0^{\ast } $$ and $$ {B}_s\to {D}_{s0}^{\ast } $$ form factors from QCD light-cone sum rules

Gubernari,

Khodjamirian,

Mandal

et al. 2023

J. High Energ. Phys.

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We present the first application of QCD light-cone sum rules (LCSRs) with B(s)-meson distribution amplitudes to the $$ {B}_{(s)}\to {D}_{(s)0}^{\ast } $$ B s → D s 0 ∗ form factors, where $$ {D}_{(s)0}^{\ast } $$ D s 0 ∗ is a charmed scalar meson. We consider two scenarios for the $$ {D}_0^{\ast } $$ D 0 ∗ spectrum. In the first one, we follow the Particle Data Group and consider a single broad resonance $$ {D}_0^{\ast }(2300) $$ D 0 ∗ 2300 . In the second one, we assume the existence of two scalar resonances, $$ {D}_0^{\ast }(2105) $$ D 0 ∗ 2105 and $$ {D}_0^{\ast }(2451) $$ D 0 ∗ 2451 , as follows from a recent theoretically motivated analysis of B → Dππ decays. The $$ B\to {D}_0^{\ast } $$ B → D 0 ∗ form factors are calculated in both scenarios, also taking into account the large total width of $$ {D}_0^{\ast }(2300) $$ D 0 ∗ 2300 . Furthermore, we calculate the $$ {B}_s\to {D}_{s0}^{\ast } $$ B s → D s 0 ∗ form factors, considering in this case only the one-resonance scenario with Ds0(2317). In this LCSRs calculation, the c-quark mass is kept finite and the s-quark mass is taken into account. We also include contributions of the two- and three-particle distribution amplitudes up to twist-four. Our predictions for semileptonic $$ B\to {D}_0^{\ast}\ell {\nu}_{\ell } $$ B → D 0 ∗ ℓ ν ℓ and $$ {B}_s\to {D}_{s0}^{\ast}\ell {\nu}_{\ell } $$ B s → D s 0 ∗ ℓ ν ℓ branching ratios are compared with the available data and HQET-based predictions. As a byproduct, we also obtain the $$ {D}_0^{\ast } $$ D 0 ∗ - and $$ {D}_{s0}^{\ast } $$ D s 0 ∗ -meson decay constants and predict the lepton flavour universality ratios $$ R\left({D}_0^{\ast}\right) $$ R D 0 ∗ and $$ R\left({D}_{s0}^{\ast}\right) $$ R D s 0 ∗ .

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Section: Jhep12(2023)015mentioning

confidence: 99%