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arXiv · 2009.03148

On the extraction of the valence transversity distributions from SIDIS data

M. Anselmino·R. Kishore·A. Mukherjee
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Abstract

The transversity distribution for $u$ and $d$ quarks is usually extracted from data on spin asymmetries in Semi Inclusive Deep Inelastic Scattering (SIDIS): however, due to its chiral odd nature, it has to be coupled to another chiral odd function, typically the Collins or the di-hadron fragmentation function. A recent suggestion of considering SIDIS data involving ratios of spin asymmetries and avoiding a knowledge of the Collins function, is briefly discussed. New measurements, involving ratios of cross sections, are suggested. They would allow a direct extraction of the transversity ratio, $h_1^{d_V}/h_1^{u_V}$. Numerical estimates are given.

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M. Anselmino, R. Kishore, A. Mukherjee. 2020-09-07. On the extraction of the valence transversity distributions from SIDIS data. https://doi.org/10.1103/physrevd.102.096012

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