Speaker: Charles Benesh (Wesleyan College)

Nuclear Modification of Valence Distributions in a Quark Model Description of He-3

Despite many years of effort, a satisfactory explanation of the nuclear EMC effect has proven elusive.We examine the modification of valence quark distributions in light nuclei using a quark model which adequately reproduces nuclear sizes and binding energies for He-3 and He-4 by balancing energy shifts due color magnetism and quark delocalization. The effect on the valence distributions of Pauli exchanges is calculated and found to be small. Our result, which contains no adjustable parameters, is in significant agreement with a published parameterization of the nuclear valence quark distributions in He-3.