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arXiv 0711.2335hep-ph
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Melosh旋转:质子丢失自旋的来源

Melosh rotation: source of the proton's missing spin

Bo-Qiang Ma

摘要:

结果表明,在考虑Melosh转动效应的朴素夸克模型中,可以很自然地理解质子积分自旋结构函数的小值.这个问题的关键在于,深度非弹性过程探测的是光锥夸克而不是瞬变夸克,质子的自旋是单个夸克的Melosh旋转光锥自旋之和,而不是直接是夸克的光锥自旋之和。

英文摘要:

It is shown that the observed small value of the integrated spin structure function for protons could be naturally understood within the naive quark model by considering the effect from Melosh rotation. The key to this problem lies in the fact that the deep inelastic process probes the light-cone quarks rather than the instant-form quarks, and that the spin of the proton is the sum of the Melosh rotated light-cone spin of the individual quarks rather than simply the sum of the light-cone spin of the quarks directly.

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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