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arXiv · 2409.01441

Parton distribution functions and transverse momentum dependence of heavy mesons

Fernando E. Serna·Bruno El-Bennich·Gastão Krein
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Abstract

The leading Fock state light-front wave functions of heavy quarkonia and $D$ and $B$ mesons are obtained from the projections of their Bethe-Salpeter wave functions on the light front. We compute therefrom their leading-twist time-reversal even transverse momentum distributions and parton distribution functions. Mirroring the behavior of parton distribution amplitudes, the support of both distributions is increasingly narrower and shifted towards larger $x$ as a function of the meson mass. The dependence of $x$ and $\k_\perp^2$ of the transverse distributions does not factorize into separate functions, and their fall-off with $\k_\perp^2$ is much slower than that of light mesons.

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Fernando E. Serna, Bruno El-Bennich, Gastão Krein. 2024-09-02. Parton distribution functions and transverse momentum dependence of heavy mesons. https://doi.org/10.1103/physrevd.110.114033

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