U.S.-Japan Joint Seminar: Neutrino-Nucleus Interactions in the Few GeV Region

该奖项支持美国科学家参加2003年12月2日至4日在加利福尼亚州欧文举行的关于少数GeV地区中微子-原子核相互作用的美日研讨会。联合组织者是加州大学欧文分校的David Casper教授和日本筑波高能加速器研究组织(KEK)的Makoto Sakuda博士。最近中微子振荡的发现为超越标准模型的物理学提供了第一个令人信服的证据，并引发了人们对未来使用强中微子源进行实验的巨大兴趣。不幸的是，如果在减少系统不确定性方面没有相应的进展，更强大的波束所提供的更高的统计精度将没有什么价值。探测中微子所需的非常大的目标质量通常由原子核(碳、氧或铁)组成，但关于中微子-原子核反应的数据很少，对核目标的影响也知之甚少。此外，低GeV能区对应于准弹性和共振的介子产生过程和深度非弹性散射之间的边界，在那里必须协调两种性质不同的反应动力学图像。在K2K、Mini-Boone和MINOS实验中寻找罕见的振荡信号，以及未来可能旨在探测轻子CP破坏的研究，都将依赖于对这些能量下唯一的中微子-核截面的准确描述。作为这些实验的合作伙伴，美国和日本处于令人兴奋且快速发展的中微子物理领域的前沿。这次研讨会将汇聚粒子和核物理界的理论家和实验者，为未来在理解中微子相互作用方面取得进展奠定基础。他们将试图用现有的数据来对抗现有的中微子散射和核物理模型，并将它们合成一个连贯的描述，可以应用于计划或提议的实验。将探讨从近期实验中收集新信息的策略，以及在未来精确测量方面的合作前景。该项目通过一些研究生的参与促进了国际人力资源的发展。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。研究人员计划在他们的网站上公布研讨会的记录。

0135659CasperThis award supports the participation of American scientists in a U.S.-Japan seminar on neutrino-nucleus interactions in the few GeV region to be held in Irvine, California from December 2-4, 2003. The co-organizers are Professor David Casper of the University of California at Irvine and Dr. Makoto Sakuda of the High Energy Accelerator Research Organization (KEK) in Tsukuba, Japan. The recent discovery of neutrino oscillation represents the first compelling evidence for physics beyond the Standard Model, and has triggered enormous interest in future experiments using intense neutrino sources. Unfortunately, the increased statistical precision afforded by more powerful beams will be of little value without corresponding progress in reducing systematic uncertainties. The very large target masses necessary to detect neutrinos are typically comprised of nuclei (Carbon, Oxygen or Iron), but data on neutrino-nucleus reactions are sparse and the effects of the nuclear target are poorly understood. Moreover, the few-GeV energy regime corresponds to the boundary between quasi-elastic and resonant pion-production processes on one hand, and deep-inelastic scattering on the other, where two qualitatively different pictures of the reaction dynamics must be reconciled. Searches for rare oscillation signals in the K2K, Mini-BOONE and MINOS experiments, as well as possible future studies aimed at probing leptonic CP violation, will rely on an accurate description of exclusive neutrino-nucleus cross-sections at these energies. As partners in these experiments the U.S. and Japan are at the forefront of the exciting and rapidly evolving field of neutrino physics. This workshop will bring together theorists and experimentalists from the particle and nuclear physics communities to lay the groundwork for future progress in understanding neutrino interactions. They will attempt to confront existing models of neutrino scattering and nuclear physics with available data and synthesize them into a coherent description, which can be applied to planned or proposed experiments. Strategies for gleaning new information from near-term experiments will be explored, as well as the prospects for collaboration on future precision measurements. The project advances international human resources through the participation of a number of graduate students. 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 proceedings of the workshop on their web sites.