Diquarks and the production of charmed baryons

TL;DR

This paper uses a quark model to compare the compactness and binding energies of different diquarks, suggesting that $(us)$ diquarks are more tightly bound than $(ud)$, which could influence charmed baryon production in high-energy collisions.

Contribution

It demonstrates that $(us)$ diquarks are more compact and have stronger binding energy than $(ud)$ diquarks using a specific quark model, providing insights into baryon production mechanisms.

Findings

$(us)$ diquarks are more compact than $(ud)$ diquarks.

$(us)$ diquarks have stronger binding energy.

Potential for increased $\xi_c/D$ production in high-energy collisions.

Abstract

Utilizing a quark model characterized by parameters that effectively replicate the masses of ground state hadrons, we illustrate that $(us)$ or $(ds)$ diquarks exhibit greater compactness in comparison to $(ud)$ diquarks. Concretely, the binding energy of the $(us)$ diquark - defined as the diquark's mass minus the combined masses of its individual quarks - is found to be stronger than that of the $(ud)$ diquark. This heightened attraction present in $(us)$ diquarks could lead to enhanced production of $\Xi_c/D$ particles in high-energy pp or ultrarelativistic heavy-ion collisions.