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A realistic method to access heavy meson light-cone distribution amplitudes from first-principle

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arxiv 2403.17492 v2 pith:O5BJMIQX submitted 2024-03-26 hep-ph hep-exhep-lat

A realistic method to access heavy meson light-cone distribution amplitudes from first-principle

Xue-Ying Han , Jun Hua , Xiangdong Ji , Cai-Dian L\"u , Wei Wang , Ji Xu , Qi-An Zhang , Shuai Zhao This is my paper
classification hep-ph hep-exhep-lat
keywords heavymesonmethodfirst-principlelcdasquarkamplitudeschallenges
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

Lightcone distribution amplitudes (LCDAs) of heavy meson within heavy quark effective theory (HQET) are crucial for predicting physical observables in $B$ decays, but unfortunately there is no first-principle result due to severe challenges. After analyzing these challenges, we propose a realistic method to determine heavy meson LCDA. We utilize equal-time correlations and incorporate a dynamic quark field for a fast moving heavy quark. To verify this method, we make use of lattice QCD simulation on a lattice ensemble with spacing $a = 0.05187$\,fm. The preliminary findings for HQET LCDAs qualitatively align with phenomenological models, and the fitted result for the first inverse moment $\lambda_B^{-1}$ is consistent with the experimentally constrain from $B \to \gamma \ell\nu_\ell$. We explore how our findings can reduce model uncertainties in predictions of heavy-to-light form factors at large recoil. These results demonstrate the promise of our method in providing first-principle predictions for heavy meson LCDAs.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. $\bar{B}_{s,d}^{0} \to J/\psi \mu^{+}\mu^{-}$ Decays in QCD Factorization

    hep-ph 2025-10 unverdicted novelty 6.0

    Computes branching ratios of order 10^{-10} for Bs and 10^{-11} for Bd decays after NLO vertex corrections in QCD factorization, plus dimuon distributions and J/psi polarization.

  2. Heavy quark mass dependence of the $\Lambda_Q$ light-cone distribution amplitude in QCD

    hep-ph 2026-07 conditional novelty 5.0

    The Lambda_Q baryon LCDA at mass m_Q equals (m_Q/m_Q^0)^2 times the LCDA at m_Q^0 evaluated at rescaled fractions x_i*m_Q/m_Q^0, times an exponentiated anomalous dimension, plus renormalon-model power corrections.

  3. Determination of $B$-meson distribution amplitudes from $B\to \pi,K,D$ transition form factors

    hep-ph 2025-12 conditional novelty 5.0

    A global fit to B→π,K,D lattice form factors and B→πℓν data yields λ_B=217(19)+82−17 MeV and |V_ub|=3.68(13)+0−1×10−3.

  4. Determination of $B$-meson distribution amplitudes from $B\to \pi,K,D$ transition form factors

    hep-ph 2025-12 unverdicted novelty 4.0

    Global fit of B to pi, K, D form factors from lattice QCD and LCSR yields lambda_B = 217(19) MeV with model variations and |V_ub| = 3.68(13) x 10^{-3}.