Semileptonic B → η,J/ψ transitions

Yao, Zhao-Qian; Binosi, Daniele; Cui, Zhu-Fang; Roberts, Craig D.

doi:10.1016/j.physletb.2021.136344

Cited by 22 publications

(14 citation statements)

References 65 publications

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“…Empirically: [84]: R(D) = 0.34(3). This value is 17% smaller than the 2016 estimate 0.397 (49) [85] and only 1.25σ larger than the SM result.…”

Section: Cabibbo Inhibited B → C Transitions: Singly Heavycontrasting

confidence: 62%

“…Similar tensions are discussed in connection with B c → J/ψ semileptonic transitions [49,72], to which we return in Sec. 5.4.…”

Section: Cabibbo Inhibited B → C Transitions: Singly Heavymentioning

confidence: 58%

“…SCI results for the B c → J/ψ semileptonic transition form factors are drawn in Fig. 7, wherein they are compared with predictions obtained using a systematic, symmetry-preserving continuum approach to strong-interaction bound-state problems [49]. Notwithstanding the SCI's algebraic simplicity, its results agree well with A 0 (t) -solid blue; V (t) -dashed green.…”

Section: Cabibbo Inhibited B → C Transitions: Doubly Heavymentioning

confidence: 71%

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Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions

Xing,

Xu,

Cui

et al. 2022

Preprint

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Using a symmetry-preserving regularisation of a vector×vector contact interaction (SCI), we complete a systematic treatment of twelve semileptonic transitions with vector meson final states:(s) , J/ψ, D * ; and thereby finalise a unified analysis of semileptonic decays of heavy+heavy and heavy+light pseudoscalar mesons to both pseudoscalar and vector meson final states. The analysis is marked by algebraic simplicity, few parameters, and the ability to consistently describe systems from Nambu-Goldstone modes to heavy+heavy mesons. Regarding the behaviour of the transition form factors, the SCI results compare well wherever sound experimental or independent theory analyses are available; hence, the SCI branching fraction predictions should be a reasonable guide. Considering the ratios R(D ( * ) (s) ), R(J/ψ), R(η c ), whose values are key tests of lepton universality in weak interactions, the SCI values agree with Standard Model predictions. The B (s) → D * (s) transitions are used to predict the precursor functions that evolve into the universal Isgur-Wise function in the heavy-quark limit, with results that conform with those from other sources where such are available. The study also exposes effects on the transition form factors that flow from interference between emergent hadron mass from the strong interaction and Higgs boson couplings via current-quark masses, including flavour symmetry violation.

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“…Empirically: [84]: R(D) = 0.34(3). This value is 17% smaller than the 2016 estimate 0.397 (49) [85] and only 1.25σ larger than the SM result.…”

Section: Cabibbo Inhibited B → C Transitions: Singly Heavycontrasting

confidence: 62%

“…Similar tensions are discussed in connection with B c → J/ψ semileptonic transitions [49,72], to which we return in Sec. 5.4.…”

Section: Cabibbo Inhibited B → C Transitions: Singly Heavymentioning

confidence: 58%

Section: Cabibbo Inhibited B → C Transitions: Doubly Heavymentioning

confidence: 71%

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Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions

Xing,

Xu,

Cui

et al. 2022

Preprint

Self Cite

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“…where γ m = 12/25, Λ QCD = 0.234 GeV, τ = e 2 − 1, and F(s) = {1 − exp(−s/[4m 2 t ])}/s, m t = 0.5 GeV. This form has been used widely; and amongst the more recent applications, predictions for vector-meson elastic form factors [60] and semileptonic B c → η c , J/ψ transitions [61] are most closely related to the analysis herein. As explained, e.g., in Ref.…”

Section: Momentum-dependent Interactionmentioning

confidence: 99%

Vector-meson production and vector meson dominance

Xu,

Chen,

Yao

et al. 2021

Preprint

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We consider the fidelity of the vector meson dominance (VMD) assumption as an instrument for relating the electromagnetic vector-meson production reaction e + p → e + V + p to the purely hadronic process V + p → V + p. Analyses of the photon vacuum polarisation and the photon-quark vertex reveal that such a VMD Ansatz might be reasonable for light vector-mesons. However, when the vector-mesons are described by momentum-dependent bound-state amplitudes, VMD fails for heavy vector-mesons: it cannot be used reliably to estimate either a photon-to-vectormeson transition strength or the momentum dependence of those integrands that would arise in calculations of the different reaction amplitudes. Consequently, for processes involving heavy mesons, the veracity of both cross-section estimates and conclusions based on the VMD assumption should be reviewed, e.g., those relating to hidden-charm pentaquark production and the origin of the proton mass.

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“…Hence, they are well suited for analysis using a newly developed technique to extract an x = 1 value for F n 2 (x)/F p 2 (x) with a well-defined uncertainty. The approach, typically described as the statistical Schlessinger point method (SPM) [36,37], has been refined in many hadron physics applications, especially those which demand model-independent interpolation and extrapolation [38][39][40][41][42][43][44][45]. The SPM avoids any specific choice of fitting function, generating form-unbiased interpolations of data as the basis for well-constrained extrapolations.…”

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confidence: 99%

Valence quark ratio in the proton

Cui,

Gao,

Binosi

et al. 2021

Preprint

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Beginning with precise data on the ratio of structure functions in deep inelastic scattering (DIS) from 3 He and 3 H, collected on the domain 0.19 ≤ xB ≤ 0.83, where xB is the Bjorken scaling variable, we employ a robust method for extrapolating such data to arrive at a model-independent result for the xB = 1 value of the ratio of neutron and proton structure functions. Combining this with information obtained in analyses of DIS from nuclei, corrected for target-structure dependence, we arrive at a prediction for the proton's valence-quark ratio: dv/uv| x B →1 = 0.230(57). Requiring consistency with this result presents a challenge to many descriptions of proton structure.

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Semileptonic B → η,J/ψ transitions

Cited by 22 publications

References 65 publications

Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions

Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions

Vector-meson production and vector meson dominance

Valence quark ratio in the proton

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Semileptonic B → η,J/ψ transitions

Cited by 22 publications

References 65 publications

Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions

Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions

Vector-meson production and vector meson dominance

Valence quark ratio in the proton

Contact Info

Product

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Semileptonic B → η,J/ψ transitions