Cold Nuclear Matter Effects on Heavy Quark Production in Relativistic Heavy Ion Collisions

This thesis presents measurements of electrons at midrapidity from the decays of heavy quarks produced in d+Au collisions at RHIC. A significant enhancement of these electrons is seen at a transverse momentum below 5 GeV/c, indicating strong CNM effects on charm quarks that are not present for lighter quarks.  We also report the R^π0_γ, the effect of the converter on the photonic electron yield from neutral pion decays.