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High Energy Physics - Phenomenology

arXiv:1503.02003 (hep-ph)
[Submitted on 6 Mar 2015 (v1), last revised 17 Apr 2015 (this version, v2)]

Title:Single-spin asymmetries in the leptoproduction of transversely polarized $Λ$ hyperons

Authors:K. Kanazawa, A. Metz, D. Pitonyak, M. Schlegel
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Abstract:We analyze single-spin asymmetries (SSAs) in the leptoproduction of transversely polarized $\Lambda$ hyperons within the collinear twist-3 formalism. We calculate both the distribution and fragmentation terms in two different gauges (lightcone and Feynman) and show that the results are identical. This is the first time that the fragmentation piece has been analyzed for transversely polarized hadron production within the collinear twist-3 framework. In lightcone gauge we use the same techniques that were employed in computing the analogous piece in $p^\uparrow p\to \pi\,X$, which has become an important part to that reaction. With this in mind, we also verify the gauge invariance of the formulas for the transverse SSA in the leptoproduction of pions.
Comments: 12 pages, 1 figure, reference added, version to appear in Phys. Lett. B
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: RBRC-1112
Cite as: arXiv:1503.02003 [hep-ph]
  (or arXiv:1503.02003v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.02003
Related DOI: https://doi.org/10.1016/j.physletb.2015.04.011

Submission history

From: Daniel Pitonyak [view email]
[v1] Fri, 6 Mar 2015 16:20:54 UTC (48 KB)
[v2] Fri, 17 Apr 2015 21:24:32 UTC (48 KB)
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