Semi-inclusive π^\pm production - tests for independent fragmentation and for polarized quark densities

Details Semi-inclusive π^\pm production - tests for independent fragmentation and for polarized quark densities Semi-inclusive π^\pm production - tests for independent fragmentation and for polarized quark densities

1999-07-07

arxiv.org/abs/hep-ph/9907265v2

Phys.Lett. B468 (1999) 299-303

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, LaTex-file, the title is changed, "Note added in proof" and a reference are added, misprints are corrected

Scientific paper

10.1016/S0370-2693(99)01213-7

We show that measurements of semi-inclusive $\pi^\pm$ asymmetries on $p$ and $n$ with polarized and unpolarized target and beams allow, without any knowledge of the polarized parton densities 1) to test independent fragmentation and SU(2) symmetry for the polarized sea, and 2) to determine separately the polarized strange and valence quark densities, and the ratio of the fragmentation functions $D_s^{\pi^+ + \pi^-}/D_u^{\pi^+ +\pi^-}$

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