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A Planned Jefferson Lab Experiment on Spin-Flavor Decomposition

Xiaodong Jiang·Peter Bosted·Mark Jones·Donal Day
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Abstract

Experiment E04-113 at Jefferson Lab Hall C plans to measure the beam-target double-spin asymmetries in semi-inclusive deep-inelastic $\vec p(e, e^\prime h)X$ and $\vec d(e, e^\prime h)X$ reactions ($h=π^+, π^-, K^+$ or$K^-$) with a 6 GeV polarized electron beam and longitudinally polarized NH$_3$ and LiD targets. The high statistic data will allow a spin-flavor decomposition in the region of $x=0.12 \sim 0.41$ at $Q^2=1.21\sim 3.14$ GeV$^2$. Especially, leading-order and next-to-leading order spin-flavor decomposition of $Δu_v$, $Δd_v$ and $Δ\bar{u} - Δ\bar{d}$ will be extracted based on the measurement of the combined asymmetries $A_{1N}^{π^+ - π^-}$. The possible flavor asymmetry of the polarized sea will be addressed in this experiment.

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Xiaodong Jiang, Peter Bosted, Mark Jones, Donal Day. 2004-12-02. A Planned Jefferson Lab Experiment on Spin-Flavor Decomposition. https://doi.org/10.1142/9789812701909_0086

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