Fundamental Physics with Hadrons and Nuclei, from Quarks to the Cosmos

We propose to continue our theoretical investigation of fundamental symmetries, and their violation, which connect to the experimental search for new physics. We consider effects that could help explain the vast preponderance of matter over antimatter in the cosmos, and possibly its dark matter, so that we study paths to identifying new sources of CP violation and of baryon number nonconservation. In this context we propose a continuing study of scattering processes that violate baryon B number by two units and to evaluate the prospects for the discovery of baryon-number-violating processes at electron scattering facilities. We continue to study the possibility of CP violation in hadronic decay. We also plan to continue our investigation of the manner in which magneto-optical effects can probe the structure of matter, particularly with the goal of determining new probes of P and/or T violation using polarized 3He. We also wish to investigate how we can improve the theoretical description of radiative corrections, particularly of Coulomb effects, that are necessary to precision beta-decay studies. This work could yield new constraints on light, hidden sectors and hence dark matter through such precision measurements.