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arXiv 0706.2163hep-phhep-ex
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Xi_b重子质量的预测

Predictions for masses of Xi_b baryons

Marek Karliner, Boaz Keren-Zur, Harry J. Lipkin, Jonathan L. Rosner

摘要:

最近CDF对σ_b^{+-}(uub和ddb)重子的观测结果表明,σ_b - Lambda_b分裂的能量在2 MeV以内,这为基于色超精细相互作用模型的理论方法提供了强有力的证实。我们现在应用这种方法来预测具有夸克含量usb和dsb的Xi_b族重子的质量-基态Xi_b在5790到5800 MeV,以及激发态Xi_b^'和Xi_b^*。不确定性的主要来源是用已知强子估算质量差m_b - m_c的方法。我们验证了由于夸克间势的细节和Xi_b-Xi_b^'混合引起的修正是很小的。

英文摘要:

The recent observation by CDF of Sigma_b^{+-} (uub and ddb) baryons within 2 MeV of the predicted Sigma_b - Lambda_b splitting has provided strong confirmation for the theoretical approach based on modeling the color hyperfine interaction. We now apply this approach to predict the masses of the Xi_b family of baryons with quark content usb and dsb - the ground state Xi_b at 5790 to 5800 MeV, and the excited states Xi_b^' and Xi_b^*. The main source of uncertainty is the method used to estimate the mass difference m_b - m_c from known hadrons. We verify that corrections due to the details of the interquark potential and to Xi_b-Xi_b^' mixing are small.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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