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Distribution amplitudes of heavy-light pseudoscalar and vector mesons from Dyson-Schwinger equations framework

Y.-Z. Xu*

  • *Contact author: yinzhen.xu@dci.uhu.es
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Phys. Rev. D 111, 114012 – Published 16 June, 2025

DOI: https://doi.org/10.1103/399s-4jrq

Abstract

We report the first Dyson-Schwinger equation predictions for the leading-twist distribution amplitudes of the B*, Bs*, and Bc* mesons, and extend the investigation to a broader set of heavy-light pseudoscalar/vector mesons. Numerical analysis shows that, in flavor-asymmetric systems, the distribution amplitude is skewed toward the heavier quark, with the position of the maximum ∼MEf/(MEf+MEg), where ME is the Euclidean constituent quark mass and f, g denote the quark flavors. Spin effects are found to be subleading compared to the influence of valence-quark composition, and lead to heavier quarks carrying more light-front momentum in vector mesons than in their pseudoscalar counterparts. Our results can be compared with both experimental and theoretical outcomes in the future.

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Phys. Rev. D 111, 114012– Published 16 June, 2025
  • Received 17 May 2025
  • Accepted 27 May 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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