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arXiv · 0902.3718

Pretzelosity $h_{1T}^{\perp}$ and quark orbital angular momentum

Jun She·Jiacai Zhu·Bo-Qiang Ma
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Abstract

We calculate the pretzelosity distribution ($h_{1T}^{\perp}$), which is one of the eight leading twist transverse momentum dependent parton distributions (TMDs), in the light-cone formalism. We find that this quantity has a simple relation with the quark orbital angular momentum distribution, thus it may provide a new possibility to access the quark orbital angular momentum inside the nucleon. The pretzelosity distribution can manifest itself through the $\sin(3ϕ_h-ϕ_S)$ asymmetry in semi-inclusive deep inelastic scattering process. We calculate the $\sin(3ϕ_h-ϕ_S)$ asymmetry at HERMES, COMPASS and JLab kinematics, and present our prediction on different targets including the proton, deuteron and neutron targets. Inclusion of transverse momentum cut in data analysis could significantly enhance the $\sin(3ϕ_h-ϕ_S)$ asymmetry for future measurements.

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Jun She, Jiacai Zhu, Bo-Qiang Ma. 2009-03-09. Pretzelosity $h_{1T}^{\perp}$ and quark orbital angular momentum. https://doi.org/10.1103/physrevd.79.054008

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