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arXiv 1107.5977hep-ph
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组分夸克中的qq $\bar{\mathbf{q}}$分量产生核子的π介子云

The qq$\bar{\mathbf{q}}$ component in the constituent quark generates the pion cloud of the nucleon

B. Povh, M. Rosina

摘要:

核子的自旋性质和味不对称海可以很好地解释,假设每个组成夸克被一个夸克-反夸克对耦合到π量子数的概率约为30%。我们发现,在$\p\to\nπ^+$和$\p\to\pπ^0$涨落中,大约有四分之一的夸克-反夸克对以π介子的形式出现,这与($\e+\p\to\e+$正向中子+X)实验中的观测值一致.

英文摘要:

The spin properties and the flavor asymmetric sea of the nucleon can be well explained by assuming that each constituent quark is surrounded with about 30% probability by a quark-antiquark pair coupled to the pion quantum numbers. We show that about one quarter of these quark-antiquark pairs show up as the pion in $\p\to\nπ^+$ and $\p\to\pπ^0$ fluctuation in agreement with the observed value in the ($\e+\p\to\e+$ forward neutron+X) experiment.

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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