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arXiv 0905.0260nucl-th
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pn->d π反应中N*(1535)共振贡献的证据

Evidence of N*(1535) resonance contribution in the pn->dϕreaction

Xu Cao, Ju-Jun Xie, Bing-Song Zou, Hu-Shan Xu

摘要:

在有效拉格朗日模型中计算了N ~*(1535)共振对pn->d_n反应的贡献。考虑了π-、η-和ρ-介子交换。结果表明,π介子和ρ介子交换的贡献占主导地位,而η介子交换的贡献很小,可以忽略不计。我们的理论结果与实验数据的总截面和角分布很好地再现。这是N*(1535)共振具有大的s \bar{s}分量导致大的与N π的耦合的另一证据,这可能是\piN和pN反应中OZI规则违反的真正起源。

英文摘要:

The N*(1535) resonance contributions to the pn->dϕreaction are evaluated in an effective Lagrangian model. The π-, η-, and ρ-meson exchange are considered. It is shown that the contributions from π- and ρ-meson exchange are dominant, while the contribution from η-meson exchange is negligibly small. Our theoretical results reproduce the experimental data of both total cross section and angular distribution well. This is another evidence that the N*(1535) resonance has large s\bar{s} component leading to a large coupling to Nϕ, which may be the real origin of the OZI rule violation in the \piN and pN reactions.

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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