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arXiv 0906.4653nucl-th
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一种新的N ~* 共振强子分子态

A new N* resonance as a hadronic molecular state

Daisuke Jido, Yoshiko Kanada-En'yo

摘要:

本文报道了我们最近对KbarKN系统(I=1/2,J^P=1/2^+)的强子分子态的研究工作.我们假设λ(1405)共振和标量介子f_{0}(980),a_{0}(980)分别被复制为KbarN和KbarK的准束缚态。用变分法对该系统进行非相对论性三体计算,发现KbarKN系统在1910 MeV附近的准束缚态低于三体分裂阈值。这个态对应于N* 的一个新的重子共振,J^P=1/2^+。我们还发现,这种共振具有两体束缚态的团簇结构,保持了孤立两粒子系统的性质。我们还简要讨论了另一种由两个Kbar和一个N组成的强子分子态,它对应于Xi^* 共振。

英文摘要:

We report our recent work on a hadronic molecule state of the KbarKN system with I=1/2 and J^P=1/2^+. We assume that the Lambda(1405) resonance and the scalar mesons, f_{0}(980), a_{0}(980), are reproduced as quasi-bound states of KbarN and KbarK, respectively. Performing non-relativistic three-body calculations with a variational method for this system, we find a quasibound state of the KbarKN system around 1910 MeV below the three-body breakup threshold. This state corresponds to a new baryon resonance of N* with J^P=1/2^+. We find also that this resonance has the cluster structure of the two-body bound states keeping their properties as in the isolated two-particle systems. We also briefly discuss another hadronic molecular state composed by two Kbar and one N, which corresponds to a Xi^* resonance.

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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