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Dynamically-generated baryon resonances with heavy flavor

机译:具有浓郁味的动态生成的缩静脉共振

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摘要

We study baryon resonances with heavy flavor in a molecular approach, thus asdynamically generated by meson-baryon scattering. This is accomplished by usinga unitary coupled-channel model taking, as bare interaction, the extension tofour flavors and spin symmetry of the Weinberg-Tomozawa interaction potential.A special attention is paid to the inclusion of heavy-quark spin symmetry andto the studies of the generated baryon resonances which complete theheavy-quark spin multiplets. We reproduce few charmed and strange baryonresonances found experimentally, that is, Lambda_c(2595), Lambda_c(2625),Xi_c(2790), Xi_c(2815), and make predictions for more states. Thebottom-flavored Lambda_b(5912) and Lambda_b(5920) states, found by the LHCbcollaboration, are also obtained by our model, thus these resonances can beinterpreted as molecular states. We also study Xi_b resonances, which belongto the same SU(3) x HQSS multiplets as the observed Lambda_b particles.Finally we analyze hidden-charm baryon resonances. In this sector, we predictseven N-like and five Delta-like states with masses around 4 GeV, most of themas bound states, and compare them with predictions from other models. Thepredicted states can be searched for in future experiments that involve studiesof heavy-flavor physics, e.g. PANDA/FAIR, where charm physics will be analyzed.
机译:我们通过分子方法研究重味的重子共振,从而通过介子重子散射动态生成。这是通过使用单一耦合通道模型完成的,该模型将Weinberg-Tomozawa相互作用势的四个风味的扩展和自旋对称性作为裸交互作用来进行特别注意包括重夸克自旋对称性的研究以及对重夸克自旋对称性的研究。产生重子共振,完成重夸克自旋多重峰。我们重现了通过实验发现的极少有魅力和奇怪的重子共振,即 Lambda_c(2595), Lambda_c(2625), Xi_c(2790), Xi_c(2815),并预测了更多状态。 LHCb合作发现的底部味 Lambda_b(5912)和 Lambda_b(5920)状态也可以通过我们的模型获得,因此这些共振可以解释为分子状态。我们还研究了 Xi_b共振,该共振与观察到的 Lambda_b粒子属于相同的SU(3)x HQSS多重峰。最后,我们分析了隐秘重子共振。在这一领域,我们预测了质量大约为4 GeV的七个类似N的状态和五个类似Delta的状态,其中大多数是受束缚状态,并将它们与其他模型的预测进行比较。可以在涉及重味物理学研究的未来实验中搜索预测状态,例如PANDA / FAIR,将分析魅力物理。

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  • 作者

    Olena Romanets;

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  • 年度 2014
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  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"english","id":9}
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