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arXiv 2005.14706nucl-exhep-exhep-phnucl-th
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通过在EIC上用旁观者标记的非相干衍射$J/ψ$产生探测氘核中的短程关联

Probing short-range correlations in the deuteron via incoherent diffractive $J/ψ$ production with spectator tagging at the EIC

Zhoudunming Tu, Alexander Jentsch, Mark Baker, Liang Zheng, Jeong-Hun Lee, Raju Venugopalan, Or Hen, Douglas Higinbotham, Elke-Caroline Aschenauer, Thomas Ullrich

摘要:

理解量子色动力学在产生核力中的作用对于揭示短程核相互作用机制及其在短程关联中的表现具有重要意义。美国布鲁克海文国家实验室未来的电子离子对撞机(EIC)将提供一个前所未有的机会,系统地研究SRC的能量和运动学区域的基本物理学,否则是不可能达到的。我们使用蒙特卡罗事件发生器BeAGLE研究了电子-氘散射事件中的SRCs。具体地说,我们研究了非相干衍射$J/ψ$矢量介子产生中可观测量对高核子内动量的敏感性。在平面波冲量近似下,初始态氘核波函数可以直接由旁观核子的四动量近似得到。我们使用真实的物理模拟和远距离探测器模拟EIC,以充分揭示这一独特过程的物理潜力。特别是,我们提供的光度和检测器的要求,在EIC的氘核研究SRC。

英文摘要:

Understanding the role of Quantum Chromodynamics in generating nuclear forces is important for uncovering the mechanism of short-ranged nuclear interactions and their manifestation in short range correlations (SRC). The future Electron-Ion-Collider (EIC) at Brookhaven National Laboratory in the US will provide an unprecedented opportunity to systematically investigate the underlying physics of SRC for energies and kinematic regions that are otherwise impossible to reach. We study SRCs in electron-deuteron scattering events using the Monte Carlo event generator BeAGLE. Specifically, we investigate the sensitivity of observables to high internal nucleon momentum in incoherent diffractive $J/ψ$ vector meson production. In a plane wave impulse approximation, the initial state deuteron wavefunction can be accessed directly from the four-momentum of the spectator nucleon. We use realistic physics simulations and far-forward detector simulations of the EIC to fully reveal the physics potential of this exclusive process. In particular, we provide the luminosity and detector requirements necessary to study SRCs in the deuteron at an EIC.

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