Target fragmentation in semi-inclusive DIS: Fracture functions, cut vertices and the OPE

We discuss semi-inclusive deep inelastic scattering (DIS) in the z → 1 limit, in particular the relationship between fracture functions, generalised cut vertices and Green functions of the composite operators arising in the OPE. The implications, in the spin-polarised case, for testing whether the “...

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Bibliographic Details
Published in:Nuclear physics. B 1999-08, Vol.555 (1), p.259-278
Main Authors: Grazzini, M., Shore, G.M., White, B.E.
Format: Article
Language:English
Subjects:
Cut vertices
Fracture functions
OPE
Polarised DIS
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Summary:We discuss semi-inclusive deep inelastic scattering (DIS) in the z → 1 limit, in particular the relationship between fracture functions, generalised cut vertices and Green functions of the composite operators arising in the OPE. The implications, in the spin-polarised case, for testing whether the “proton spin” effect is target-independent are explored. Explicit calculations in (ƒ 3) 6 theory are presented which are consistent with our observations.
ISSN:0550-3213
1873-1562
DOI:10.1016/S0550-3213(99)00347-8