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arXiv 0706.3672hep-phhep-th
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Bootstrap和$πN$谐振参数的物理值

Bootstrap and the physical values of $πN$ resonance parameters

Kirill M. Semenov-Tian-Shansky, Alexander V. Vereshagin, Vladimir V. Vereshagin

摘要:

这是该系列中的第6篇论文,发展了管理强相互作用的有效散射理论的形式。在我们以前的论文中提出的理论方案的基础上,我们在这里集中于实际方面,并将我们的方法应用于弹性π-核子散射振幅。我们测试数值的π介子核子谱求和规则,遵循从树级引导约束。我们展示了如何使用这些约束来估计张量和矢量$NNρ$耦合常数。最后,我们证明了在我们的方法框架下计算的树级低能膨胀系数与已知的实验数据显示出很好的一致性。这些结果使我们能够声称,从计算的角度来看,扩展的扰动计划是相当合理的。

英文摘要:

This is the 6th paper in the series developing the formalism to manage the effective scattering theory of strong interactions. Relying on the theoretical scheme suggested in our previous publications we concentrate here on the practical aspect and apply our technique to the elastic pion-nucleon scattering amplitude. We test numerically the pion-nucleon spectrum sum rules that follow from the tree level bootstrap constraints. We show how these constraints can be used to estimate the tensor and vector $NNρ$ coupling constants. At last, we demonstrate that the tree-level low energy expansion coefficients computed in the framework of our approach show nice agreement with known experimental data. These results allow us to claim that the extended perturbation scheme is quite reasonable from the computational point of view.

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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