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

Kanazawa, K.; Metz, A.; Pitonyak, D.; Schlegel, M.

doi:10.1016/j.physletb.2015.04.011

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

Journal Article · Mon Apr 13 00:00:00 EDT 2015 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2015.04.011· OSTI ID:1184841

Kanazawa, K. ^[1]; Metz, A. ^[1]; Pitonyak, D. ^[2]; Schlegel, M. ^[3]

Temple Univ., Philadelphia, PA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Tubingen Univ., Tubingen (Germany)

We analyze single-spin asymmetries (SSAs) in the leptoproduction of transversely polarized Λ 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↑ p → π 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. (author)

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-98CH10886; PHY-1205942

OSTI ID:: 1184841

Journal Information:: Physics Letters. B, Vol. 744, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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