arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1004.4877nucl-thhep-ph
收藏

barKN相互作用的能量依赖性和奇异双重子的共振极

Energy dependence of barKN interactions and resonance pole of strange dibaryons

Yoichi Ikeda, Hiroyuki Kamano, Toru Sato

摘要:

本文用两种s波barKN相互作用的能量无关势和能量相关势模型研究了奇异双重子的共振能,这两种势都是由有效手征拉格朗日量的首阶项通过一定的约化导出的.这些势模型在I=0通道中产生了两体barKN-piSigma振幅的不同的离壳行为,即,具有能量无关(能量相关)势的模型预测了λ(1405)区域中的一个(两个)共振极,而它们同样很好地描述了可用的数据。我们发现,能量无关势模型预言了奇异重子的一个共振极,而能量相关势模型预言了两个共振极:一个是barKNN的浅准束缚态,另一个是大宽度piYN的共振.研究奇异双重子的结合能将对阐明λ(1405)区s波barKN -π σ的共振结构有重要贡献。

英文摘要:

We study the resonance energy of the strange dibaryons using two models with the energy-independent and energy-dependent potentials for the s-wave barKN interaction, both of which are derived by certain reductions from the leading order term of the effective chiral Lagrangian. These potential models produce rather different off-shell behaviors of the two-body barKN - piSigma amplitudes in I=0 channel, i.e., the model with energy-independent (energy-dependent) potential predicts one (two) resonance pole in the Lambda(1405) region, while they describe the available data equally well. We find that the energy-independent potential model predicts one resonance pole of the strange dibaryons, whereas the energy-dependent potential model predicts two resonance poles: one is the shallow quasi-bound state of the barKNN, and another is the resonance of the piYN with large width. An investigation of the binding energy of the strange dibaryons will make a significant contribution to clarify resonance structure of s-wave barKN - piSigma around the Lambda(1405) region.

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。

↑