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arXiv 1810.07589nucl-thhep-lathep-ph
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质子内部的压力分布和剪切力

The pressure distribution and shear forces inside the proton

P. E. Shanahan, W. Detmold

摘要:

使用晶格量子色动力学(LQCD)计算的能量动量张量的质子内部的压力和剪切力的分布进行了研究,允许第一个模型独立的质子结构的这些基本方面的确定。这是通过结合最近的LQCD结果的胶子贡献的能量动量张量与早期计算的夸克的贡献。还讨论了LQCD计算在探索和补充最近从深度虚拟康普顿散射实验中提取质子压力分布的假设中的实用性。在此基础上,研究了在托马斯·杰斐逊国家加速器装置和未来的电子离子对撞机上进行的旨在更精确地确定压力和剪切分布的实验的目标运动学。

英文摘要:

The distributions of pressure and shear forces inside the proton are investigated using lattice Quantum Chromodynamics (LQCD) calculations of the energy momentum tensor, allowing the first model-independent determination of these fundamental aspects of proton structure. This is achieved by combining recent LQCD results for the gluon contributions to the energy momentum tensor with earlier calculations of the quark contributions. The utility of LQCD calculations in exploring, and supplementing, the assumptions in a recent extraction of the pressure distribution in the proton from deeply virtual Compton scattering experiments is also discussed. Based on this study, the target kinematics for experiments aiming to determine the pressure and shear distributions with greater precision at Thomas Jefferson National Accelerator Facility and a future Electron Ion Collider are investigated.

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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