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arXiv · hep-ph/0311221

Chiral-Odd Fragmentation Functions in Single Pion Inclusive Electroproduction

Leonard P. Gamberg·Dae Sung Hwang·Karo A. Oganessyan
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Abstract

We consider a sub-leading twist chiral-odd pion fragmentation function and explore its contribution in single pion semi-inclusive electroproduction. We evaluate the single beam-spin azimuthal asymmetry $A_{LU}$ and the double spin asymmetry $A_{LT}$ in polarized electroproduction of pions from an unpolarized and transversely polarized nucleon respectively. The beam asymmetry is expressed as the product of chiral-odd, and $T$-odd and even distribution and fragmentation functions. The double spin asymmetry contains information on the quark's transversity distribution. In a quark diquark-spectator framework we estimate these asymmetries at $6 {\rm GeV}$, $ 12 {\rm GeV}$, and $27.5 {\rm GeV}$ energies.

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Leonard P. Gamberg, Dae Sung Hwang, Karo A. Oganessyan. 2004-01-21. Chiral-Odd Fragmentation Functions in Single Pion Inclusive Electroproduction. https://doi.org/10.1016/j.physletb.2004.01.054

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