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arXiv 2408.09689hep-phnucl-th
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粲偶素引力形状因子 $D$:基于剪切应力的提取

Gravitational form factor $D$ of charmonium from shear stress

Tianyang Hu, Xianghui Cao, Siqi Xu, Yang Li, Xingbo Zhao, James P. Vary

AI总结:

本文从剪切应力提取粲偶素引力形状因子,并与能量密度结果对比,验证了流守恒破坏效应小,支持先前工作。

摘要:

基于我们近期在协变光前动力学中对应力-能量张量强子矩阵元的分析,我们从剪切应力 $T^{12}$ 中提取了粲偶素的引力形状因子 $D(Q^2)$。这与我们近期使用(光前)能量密度 $T^{+-}$ 的工作形成对比。实际上,通过比较这两种流,我们识别出了导致流守恒破坏的项。基于基光前量子化的数值结果表明,破坏效应很小,且从这两种流提取的 $D$ 项彼此接近,从而验证了我们先前使用 $T^{+-}$ 的工作。

英文摘要:

Based on our recent analysis of the hadronic matrix element of the stress-energy tensor in covariant light front dynamics, we extract the charmonium gravitational form factor $D(Q^2)$ from shear stress $T^{12}$. This is in contrast to our recent work using the (light-front) energy density $T^{+-}$. Indeed, by comparing these two currents, we identify terms that are responsible for the violation of the current conservation. Numerical results based on basis light-front quantization show that the violation effects are small and the $D$-term extracted from the two currents are close to each other, hence validating our previous work using $T^{+-}$.

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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