Fundamental Problems at Intermediate Energies (Physics)

研究将在实验π介子和重- 离子物理学在TRIUMF回旋加速器和伯克利 超级希拉克设施。 本文的工作主要集中在（1）π介子 极化π介子散射产生的韧致辐射 质子，和（2）异常电子和正电子发射线 产生于高Z原子核的重离子碰撞。 微分 介子韧致辐射的截面和不对称性 实验将在δ等压激发区进行测量 来调查长期以来与理论的分歧 沉重的- 离子实验将在运动学上完成，检测 与散射离子重合的电子和正电子， 更高的统计准确性，并使用改进的检测系统 GSI达姆施塔特的早期测量结果。 重离子 衡量解决了可能的新的 中性基本粒子，真空的反常状态， 奇异QED效应

Research will be carried out in experimental pion and heavy- ion physics at the TRIUMF cyclotron and at the Berkeley SuperHilac facility. The work will focus on (1) pion bremsstrahlung resulting from pion scattering from polarized protons, and (2) anomalous electron and positron emission lines produced in heavy ion collisions of high-Z nuclei. Differential cross sections and asymmetries in the pion bremsstrahlung experiment will be measured in the delta isobar excitation region to investigate longstanding disagreement with theory. The heavy- ion experiments will be kinematically complete, detecting electrons and positrons in coincidence with scattered ions, have high statistical accuracy, and use improved detection systems over earlier measurements at GSI Darmstadt. The heavy-ion measurement addresses issues raised concerning possible new neutral elementary particles, abnormal states of the vacuum, and exotic QED effects.