Light hybrid baryons in QCD sum rules

TL;DR

This paper uses QCD sum rules to predict the mass spectra of hybrid baryons, identifying the lightest states as negative-parity nucleon and delta hybrids, and suggests experimental searches via heavy quarkonium decays.

Contribution

It provides the first mass predictions for light hybrid baryons with both parities using QCD sum rules, highlighting the negative-parity states as the lowest-lying.

Findings

Negative-parity N_{1/2^-} and Δ_{1/2^-} are the lightest hybrid baryons.

Positive-parity hybrid baryons are significantly heavier.

Suggested experimental search channels include χ_{cJ} and Υ decays.

Abstract

We have calculated the mass spectra of nucleon and delta hybrid baryons with both positive-parity and negative-parity by using the method of QCD sum rules. We predicte that the lowest-lying hybrid baryons are the negative-parity $N_{1/2^-}$ and $\Delta_{1/2^-}$ states, while the positive-parity ones are much heavier. We suggest to search for these light hybrid baryons via the $\chi_{cJ}/\Upsilon$ decay processes in the future.