Chiral-odd fragmentation functions in single pion inclusive electroproduction

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 ALU and the double spin asymmetry ALT in polarized electroproduction of pions from an unpolarized...

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Bibliographic Details
Published inPhysics letters. B Vol. 584; no. 3-4; pp. 276 - 284
Main Authors Gamberg, Leonard P., Hwang, Dae Sung, Oganessyan, Karo A.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.2004
Elsevier Science
Subjects
Exact sciences and technology
Fragmentation into hadrons
Jets in large-q2 scattering
Physics
Specific reactions and phenomenology
The physics of elementary particles and fields
13.87.Fh
13.60.-r
13.88.+e
14.20.Dh
Nucleons
Quarks
Pions
Asymmetry
Electroproduction
Fragmentation
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Summary: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 ALU and the double spin asymmetry ALT 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 GeV, 12 GeV, and 27.5 GeV energies.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2004.01.054