Speaker
Christopher Cocuzza
(Temple University)
Description
We present a new global QCD analysis of spin-averaged and spin-dependent PDFs from high-$x$ DIS and $W$ production data using a Monte Carlo approach. This analysis includes the first extraction of the helicity-dependent antiquark asymmetry $\Delta \bar{u} - \Delta \bar{d}$ using $W$ production data in $\vec{p} p$ collisions at RHIC. We also focus on the high-$x$, low-$W$ region, where effects from power corrections, such as target mass corrections (TMCs) and higher twists, are particularly important, especially for the $d/u$ PDF ratio. We quantify the effects on the extracted PDFs from various theoretical treatments of the power corrections and cuts on the experimental kinematics.
Primary authors
Christopher Cocuzza
(Temple University)
Jacob Ethier
(College of William and Mary/Jefferson Lab)
Wally Melnitchouk
(Jefferson Lab)
Andreas Metz
(Physics Department, Temple University, Philadelphia)
Nobuo Sato
(ODU)
