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arXiv 2208.00501nucl-thhep-phnucl-ex
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氘核中的一种新结构

A New Structure in the Deuteron

Misak M. Sargsian, Frank Vera

摘要:

我们证明了一个范式的转变,从考虑作为一个系统的束缚质子和中子的氘核,考虑它作为一个伪矢量系统,我们观察质子和中子,结果在探测一个新的“不完整的”P-状态的光阵面(LF)上的结构的可能性,在非常大的内部动量,这可以实现在高能量转移的氘核的电衰变。研究了真空涨落被抑制的光阵面上的氘核,我们发现这种新的结构与传统的S-和D-态一起,是反应转移能量的主导级,P态的不完整性导致角条件的破坏,这种破坏只有在氘核中含有非-核子结构如$Δ$、$Δ$、$N^*N$或隐藏的颜色成分。我们表明,实验验证的签名“不完整”的P-状态是角各向异性的LF动量分布的核子在氘核以及增强张量极化强度超出了S-和D-波预测在大的内部动量在氘核。

英文摘要:

We demonstrate that a paradigm shift from considering the deuteron as a system of bound proton and neutron to considering it as a pseudo-vector system in which we observe proton and neutron, results in a possibility of probing a new "incomplete" P-state like structure on the light-front (LF), at extremely large internal momenta, which can be achieved in high energy transfer electro-disintegration of the deuteron. Investigating the deuteron on the light-front, where the vacuum-fluctuations are suppressed, we found that this new structure, together with conventional S- and D- states, is a leading order in transferred energy of the reaction, thus it is not suppressed on the light-front.The incompleteness of the observed P-state results in a violation of angular condition which can happen only if deuteron contains non-nucleonic structures such as $Δ$$Δ$, $N^*N$ or hidden color components. We demonstrate that experimentally verifiable signatures of "incomplete" P-states are angular anisotropy of LF momentum distribution of the nucleon in the deuteron as well as an enhancement of the tensor polarization strength beyond the S- and D- wave predictions at large internal momenta in the deuteron.

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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