Mar 23 – 27, 2020
Brooklyn, NY
US/Eastern timezone

Pion Parton Distributions Using Threshold Resummation

Mar 25, 2020, 3:42 PM
18m
Brooklyn, NY

Brooklyn, NY

333 Adams Street, Brooklyn, New York 11201, USA
Contributed Talk Structure Functions and Parton Densities Structure function and parton densities

Speaker

Patrick Barry (North Carolina State University)

Description

Following our recent Monte Carlo determination of the pion’s PDFs from Drell-Yan (DY) and leading neutron electroproduction data, we extend the analysis by including effects from threshold resummation. At higher orders in the strong coupling, $\alpha_S$, large logarithmic corrections due to soft gluon emissions become important in the $q\bar{q}$ channel near threshold, which can be summed over all orders of $\alpha_S$. However, different prescriptions exist for how the threshold resummation is implemented, for instance, using varying levels of approximation in the Minimal Prescription and Borel Summation. We report the results of the first simultaneous fit to the valence, sea, and gluon distributions in the pion taking into account the ambiguities in the resummation calculations.

Primary authors

Mr Nobuo Sato-Gonzalez (Jefferson Lab) Wally Melnitchouk (Jefferson Lab) Prof. Chueng Ji (North Carolina State University) Patrick Barry (North Carolina State University)

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