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First global QCD analysis of the TMD g1T from semi-inclusive DIS data

; 
Kang, Zhong-Bo
; 
Metz, Andreas
; 
Penn, Gregory
; 
Pitonyak, Daniel
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Journal article
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2022-02-10
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Physics
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http://hdl.handle.net/20.500.12613/10409
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BhattacharyaEtAl-JournalArticle-2022-02.pdf
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http://dx.doi.org/10.1103/physrevd.105.034007
Abstract
The worm-gear transverse momentum dependent (TMD) function g1T is one of the eight leading-twist TMDs and has the probabilistic interpretation of finding a longitudinally polarized quark inside a transversely polarized hadron. In this work, we present the first simultaneous extraction of g1T from all the available experimental measurements. The study involves the analysis of COMPASS, HERMES, and Jefferson Lab data on semi-inclusive deep-inelastic scattering using Monte Carlo techniques. We also compare g1T obtained from this experimental data with different theoretical approaches, such as the large-Nc approximation, the Wandzura-Wilczek-type approximation, and lattice QCD.
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Physical Review D (particles, fields, gravitation, and cosmology), Vol. 105, Iss. 3
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