On the evidence for different widths of pion and proton transverse momentum distributions

30 Mar 2023, 10:50
20m
105AB (MSU Kellogg Center)

105AB

MSU Kellogg Center

Parallel talk WG5: Spin and 3D Structure WG5

Speaker

Patrick Barry

Description

In this analysis, we report a comparison of transverse momentum dependent parton distribution functions (TMDPDFs) between pions and protons through a simultaneous extraction of collinear and transverse degrees of freedom in the pion. We extract proton TMDPDFs along with pion TMDPDFs from low transverse-momentum dependent fixed-target Drell-Yan data as well as collinear pion PDFs from Drell-Yan and leading neutron data, marking the first analysis of its kind. We observe a very distinctive behavior of the conditional expectation value of the transverse separation of quarks for a given $x$. We provide some possible explanation of the phenomena and new avenues for further explorations.

Submitted on behalf of a Collaboration? No
Participate in poster competition? No

Primary authors

Alexey Prokudin (PSU Berks and JLab) Daniel Pitonyak (Lebanon Valley College) ERIC MOFFAT Prof. Leonard Gamberg (Penn State University Berks) Nobuo Sato Patrick Barry Wally Melnitchouk (Jlab)

Presentation materials