# 10th International Workshop on Charm Physics (CHARM 2020)

from 31 May 2021 to 4 June 2021
Mexico/General timezone
Thanks for your contribution to the success of this workshop!!
Home > Timetable > Contribution details

# A Study of J/\psi Decays into baryon-antibaryon pairs

## Speakers

• Nikolay KIVEL

## Description

The suppressed helicity flip amplitude in baryon-antibaryon decays of $J/\psi$ is calculated within the effective field theory framework. It is shown that at the leading-order approximation this contribution is factorisable and the overlap with the hadronic final state can be described by collinear matrix elements. The obtained contribution depends on the nucleon light-cone distribution amplitudes of twist-3 and twist-4. The obtained result is used for a qualitative phenomenological analysis of existing data: branching ratios and the angular distributions $\alpha_B$ of the cross section $e^+e^-\to J/\psi\to B\bar B$.