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Apr 13 – 16, 2021
US/Eastern timezone

Simultaneous Extraction of Spin-Dependent and Spin-Averaged PDFs from W Production Data

Apr 13, 2021, 1:50 PM
20m

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)

Presentation materials