Manifestation of $s\to Λ$ fragmentation matrix elements via transverse $Λ$ polarization in unpolarized $e^-e^+$ annihilation

Details Manifestation of $s\to Λ$ fragmentation matrix elements via transverse $Λ$ polarization in unpolarized $e^-e^+$ annihilation Manifestation of $s\to Λ$ fragmentation matrix elements via transverse $Λ$ polarization in unpolarized $e^-e^+$ annihilation

1996-01-13

arxiv.org/abs/hep-ph/9601256v2

Phys.Lett. B368 (1996) 281-290

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 12 pages, typos corrected

Scientific paper

Making use of the collinear expansion technique developed by Ellis, Furmanski and Petrozio, and the special propagator concept invented by Qiu, we present a factorization approach to the photon fragmentation tensor for the inclusive Lambda hyperon production. As a result, the structure function $\tilde F$, which is related to the transverse polarization of the inclusive Lambda hyperon in unpolarized electron-positron annihilation, is expressed as a combination of four parton fragmentation matrix elements. Since the inclusive $\Lambda$ production we considered is theoretically the simplest, our study can be taken as a question to the operatability and practability of the first nonleading QCD factorization theorem in the transverse $\Lambda$ polarization phenomena.

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