PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Poster Session
LCDAs of heavy hadrons and their first inverse moments
A. Shukhtina
Full text: pdf
Pre-published on: December 20, 2022
Published on: June 15, 2023
Heavy-quark symmetry (HQS), despite being approximate, allows to relate dynamically many hadron systems. In the
HQS-limit, heavy mesons and doubly-heavy baryons are very similar as their dynamics is determined by a light quark moving in a color field of a static source. As in the meson case, matrix elements of non-local interpolation currents between the baryon state and vacuum are determined by light-cone distribution amplitudes (LCDAs). The first inverse moment of the leading twist $B$-meson distribution amplitude is a hadronic parameter needed for an accurate theoretical description of B-meson exclusive decays. It is quite natural that a similar moment of doubly-heavy baryon is of importance in exclusive doubly-heavy baryons' decays. In the Heavy Quark Effective Theory, we obtain the sum rules for the first inverse moment based on the correlation functions containing non-local heavy-light operator of the doubly-heavy baryon and its local interpolating current.
DOI: https://doi.org/10.22323/1.414.0974
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