U.S.-Japan Cooperative Science: Hyperon-Hyperon and Hyperon-Nucleon Interaction

该奖项支持新墨西哥大学的Bernd Bassalleck教授和日本高能加速器研究组织(KEK)的Tomokazu Fukuda教授之间为期三年的合作研究项目。研究人员将对超子-超子和超子-核子相互作用进行研究。这是最基本的重子-重子相互作用，分别涉及一个和两个奇怪的夸克。该提案的主要焦点是获得批准的KEK实验E452。它的目标是研究E+超子和质子之间的自旋相关相互作用，特别是E+自旋-轨道相互作用，这被预测为很大的相互作用。使这一现象特别有趣的是，这与现在牢固确立的A自旋-轨道相互作用的微小形成了鲜明的对比。实际测量是使用一种带有像增强器的新型闪烁探测器和用于完全三维径迹重建的CCD读出，在极化的E+离开质子的弹性散射中进行左右不对称。该项目汇集了两个拥有互补专业知识和研究能力的实验室的努力。这项研究的结果将极大地加强我们对重子-重子相互作用的理解，利用奇异夸克作为常规核物理中通常不存在的特殊探测器。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际理解与合作。研究人员计划在科学期刊上发表他们的研究成果，并在科学会议上报告这些发现。

0003701BassalleckThis award supports a three-year collaborative research project between Professor Bernd Bassalleck of the University of New Mexico and Professor Tomokazu Fukuda of the High Energy Accelerator Research Organization (KEK) in Japan. The researchers will undertake a study of hyperon-hyperon and hyperon-nucleon interaction. This is the most fundamental baryon-baryon interaction involving one and two strange quarks, respectively. The primary focus of the proposal is the approved KEK experiment E452. Its goal is the study of the spin-dependent interaction between the E+ hyperon and the proton, in particular the E+ spin-orbit interaction, which is predicted to be large. What makes this particularly interesting is the sharp contrast to the now firmly established smallness of the A spin-orbit interaction. The actual measurement to be performed is the left-right asymmetry in the elastic scattering of polarized E+ off protons using a novel scintillation detector with Image Intensifier and CCD readout for complete 3-dimensional track reconstruction. The project brings together the efforts of two laboratories that have complementary expertise and research capabilities. Results of this research should provide a significant enhancement of our understanding of the fundamental baryon-baryon interaction utilizing the strange quark as a special probe not normally available in conventional nuclear physics. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. The researchers plan to publish results of their research in scientific journals and report on the findings at scientific meetings.