26-30 July 2021
Europe/Berlin timezone

First inverse moment of the doubly-heavy baryon distribution amplitude from HQET sum rule

Not scheduled


Poster QCD and Hadronic Physics T06: QCD and Hadronic Physics


Alisa Shukhtina (P.G. Demidov Yaroslavl State University)


Heavy-quark symmetry (HQS), despite being approximate, allows to relate dynamically many hadron systems.In the HQS-limit doubly-heavy baryons, whose dynamics is determined by a light quark moving in a color field of a static pair of heavy quarks, are similar to heavy mesons with a heavy antiquark being a color source. Non-local interpolation currents are introduced and corresponding matrix elements between the baryon and vacuum state are expressed in terms of light-cone distribution amplitudes. As well known, the first inverse moment of the leading twist B-meson distribution amplitude (DA) is a very important hadronic parameter needed for an accurate theoretical description of B-meson exclusive decays. It is quite natural that a similar moment of doubly-heavy baryons is of importance in exclusive doubly-heavy baryons' decays. We obtain HQET sum rules for the first inverse moment based on the correlation functions containing nonlocal heavy-light operators of doubly-heavy baryons and their local interpolating currents. First estimates of this moment are presented.

Email aliceshu@yandex.ru
Collaboration / Activity Theory
First author Alisa Shukhtina

Primary authors

Alisa Shukhtina (P.G. Demidov Yaroslavl State University) Prof. Alexander Parkhomenko (P.G. Demidov Yaroslavl State University)

Presentation Materials