21–23 Jun 2023
Center for Frontiers in Nuclear Science, Stony Brook University
US/Eastern timezone

Simultaneous Global Analysis of Dihadron Fragmentation Functions and Transversity PDFs

22 Jun 2023, 16:30
30m
Center for Frontiers in Nuclear Science, Stony Brook University

Center for Frontiers in Nuclear Science, Stony Brook University

Department of Physics and Astronomy Stony Brook University Stony Brook, NY 11794-3800

Speaker

Christopher Cocuzza (Temple University)

Description

We propose a new definition of unintegrated dihadron fragmentation functions (DiFFs) which is compatible with the probability interpretation of collinear DiFFs and derive the leading-order evolution equations for these DiFFs. With these new definitions, we perform the first simultaneous extraction of DiFFs and transversity PDFs using data from semi-inclusive annihilation (SIA) in electron-positron collisions, semi-inclusive DIS, and proton-proton collisions. In particular, we include new SIA data from Belle that provides, for the first time, experimental constraints on the unpolarized DiFFs, as well as proton-proton data from STAR at center of mass energy 500 GeV. We present results for the transversity PDFs and tensor charge and explore the impact of theoretical constraints such as the Soffer bound and lattice computations of the tensor charge.

Primary authors

Alexei Prokudin (Penn State Berks) Andreas Metz (Temple University) Christopher Cocuzza (Temple University) Daniel Pitonyak (Lebanon Valley College) Ralf Seidl (RIKEN) Wally Melnitchouk (Jefferson Lab) nobuo sato (Jefferson Lab)

Presentation materials