Nuclear effects

ISOVECTOR EMC EFFECT FROM GLOBAL QCD ANALYSIS WITH MARATHON DATA
A new paper reports on a Monte Carlo global QCD analysis of unpolarized parton distribution functions (PDFs), including for the first time constraints from ratios of 3He to 3H structure functions recently obtained by the MARATHON experiment at Jefferson Lab. The simultaneous analysis of nucleon PDFs and nuclear effects in A=2 and A=3 nuclei reveals the first indication for an isovector nuclear EMC effect in light nuclei. While the MARATHON data yield relatively weak constraints on the neutron to proton structure function ratio and the d/u PDF ratio, they suggest a strongly enhanced nuclear effect on the d quark PDF in the bound proton.

ISOVECTOR EMC EFFECT FROM GLOBAL QCD ANALYSIS WITH MARATHON DATA
A new paper reports on a Monte Carlo global QCD analysis of unpolarized parton distribution functions (PDFs), including for the first time constraints from ratios of 3He to 3H structure functions recently obtained by the MARATHON experiment at Jefferson Lab. The simultaneous analysis of nucleon PDFs and nuclear effects in A=2 and A=3 nuclei reveals the first indication for an isovector nuclear EMC effect in light nuclei. While the MARATHON data yield relatively weak constraints on the neutron to proton structure function ratio and the d/u PDF ratio, they suggest a strongly enhanced nuclear effect on the d quark PDF in the bound proton.