Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session E06: Minisymposium: 3D Nucleon Structure II
7:00 PM–8:45 PM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Queens 5
Chair: Alexei Prokudin, Penn State Berks
Abstract: E06.00004 : Measurements of Transverse Spin Dependent $pi^+pi^-$ Azimuthal Correlation Asymmetry and Unpolarized $pi^+pi^-$ Cross Section in $pp$ Collisions at $sqrt s = 200$ GeV at STAR
7:45 PM–8:00 PM
Presenter:
Babu R Pokhrel
(Temple University)
Author:
Babu R Pokhrel
(Temple University)
Therefore, precise knowledge of the IFF and unpolarized dihadron fragmentation functions are necessary to achieve a model-independent extraction of $h_1^q(x)$ from these measurements. Obtaining these fragmentation functions requires measuring the unpolarized dihadron cross section in $pp$ collisions, which is crucial for constraining the gluon fragmentation function. In this presentation, we will share preliminary results on $A_{UT}$ using $p^uparrow p$ data collected in 2015, and the unpolarized cross section using $pp$ data collected in 2012 for $pi^+pi^-$ pairs at $sqrt{s} = 200$ GeV by the STAR experiment.
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