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B-meson Ioffe-time distribution amplitude at short distances

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arxiv 2006.05663 v2 pith:IBBEY67X submitted 2020-06-10 hep-ph hep-lat

$B$-meson Ioffe-time distribution amplitude at short distances

classification hep-ph hep-lat
keywords mesonitdadistributionlcdareducedamplitudeapproachioffe-time
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

We propose the approach for a lattice investigation of light-cone distribution amplitudes (LCDA) of heavy-light mesons, such as the $B$-meson, using the formalism of parton pseudo-distributions. A basic ingredient of the approach is the study of short-distance behavior of the $B$-meson Ioffe-time distribution amplitude (ITDA), which is a generalization of the $B$-meson LCDA in coordinate space. We construct a reduced ITDA for the $B$-meson, and derive the matching relation between the reduced ITDA and the LCDA. The reduced ITDA is ultraviolet finite, which guarantees that the continuum limit exists on the lattice.

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