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Title: Updated QCD global analysis of single transverse-spin asymmetries: Extracting $$\tilde{H}$$, and the role of the Soffer bound and lattice QCD

Journal Article · · Physical Review. D.

Here, we present an update to the QCD global analysis of single transverse-spin asymmetries presented in [J. Cammarota et al. (Jefferson Lab Angular Momentum Collaboration), Phys. Rev. D 102, 054002 (2020).] (JAM3D-20). JAM3D-20 simultaneously included transverse momentum dependent and collinear twist-3 observables, both of which are sensitive to quark-gluon-quark correlations in hadrons. In this study we extract for the first time the twist-3 chiral odd fragmentation function $$\tilde{H}$$ by incorporating the sin φs modulation data from semi-inclusive deep-inelastic scattering along with its contribution to the single transverse-spin asymmetry in pion production from proton-proton collisions. We also explore the impact of lattice QCD tensor charge calculations and the Soffer bound on our global analysis. We find that both constraints can be accommodated within our results, with $$\tilde{H}$$ playing a key role in maintaining agreement with the data from proton-proton collisions.

Research Organization:
Penn State Univ. Berks, Reading, PA (United States); The Pennsylvania State University, University Park, PA (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
JAM Collaboration; Jefferson Lab Angular Momentum (JAM) Collaboration
Grant/Contract Number:
AC05-06OR23177; FG02-07ER41460
OSTI ID:
1881039
Report Number(s):
DOE/OR/23177-5477; JLAB-THY-22-3604; arXiv:2205.00999
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 3 Vol. 106; ISSN 2470-0010; ISSN 2470-0029
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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