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arXiv · 0911.1156

Light flavor baryon spectrum with higher order hyperfine interactions

Yan Chen·Bo-Qiang Ma
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Abstract

We study the spectrum of light flavor baryons in a quark-model framework by taking into account the order $\mathrm{O}(α_s^2)$ hyperfine interactions due to two-gluon exchange between quarks. The calculated spectrum agree better with the experimental data than the results from hyperfine interactions with only one-gluon exchange. It is also shown that two-gluon exchange hyperfine interactions bring a significantly improved correction to the Gell-Mann--Okubo mass formula. Two-gluon exchange corrections on baryon excitations (including negative parity baryons) are also briefly discussed.

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Yan Chen, Bo-Qiang Ma. 2009-11-06. Light flavor baryon spectrum with higher order hyperfine interactions. https://doi.org/10.1016/j.nuclphysa.2009.09.005

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