Light Cone 2021: Physics of Hadrons on the Light Front

A study of the $J/\psi$ baryon-antibaryon decays beyond the leading power accuracy

2 Dec 2021, 16:30

20m

Emerald Hall A (Jeju Booyoung Hotel)

Contributed talk Parallel Session

Speaker

Nikolay Kivel (Technische Universitaet Muenchen)

Description

The $J/\psi$ decays into octet baryon-antibaryons pairs is studied using the QCD factorisation framework. The power suppressed corrections are calculated for the first time using higher twist baryon light-cone distribution amplitudes. The obtained results are used for a phenomenological analysis of experimental data. It is found that the polarisation parameter $\alpha_B$ can be described within accuracy 10-30%, which may indicate that the pQCD contribution dominates this observable. The possibility to constrain the baryon DAs from the $J/\psi$ decays will also be discussed.

Presentation materials

Kivel LC2021 .pdf