Semi-inclusive structure functions in the spectator model
A. Bacchetta1 - S. Boffi2 - R. Jakob3
1 Division of Physics and Astronomy, Faculty of Science,
Vrije Universiteit De Boelelaan 1081, 1081 HV Amsterdam,
The Netherlands
2 Dipartimento di Fisica Nucleare e Teorica,
Università di Pavia and INFN, Sezione di Pavia,
Via Bassi 6, 27100 Pavia, Italy
3 Fachbereich Physik, Universität Wuppertal,
Gauss-Straße 20, 42097 Wuppertal, Germany
Received: 26 May 2000
Communicated by Th. Walcher
Abstract
We establish the relationship between distribution and fragmentation functions
and the structure functions appearing in the cross-section
of polarized 1-particle inclusive deep-inelastic scattering.
We present spectator model evaluations of these structure functions
focusing on the case of an outgoing
spin-
baryon. Distribution functions obtained in
the spectator model are known to fairly agree at low-energy scales
with global parameterizations extracted from totally inclusive DIS data.
Therefore, we expect it to give good hints on the functional dependence of the
structure functions on the scaling variables
,
z and on the transverse
momentum of the observed outgoing hadron,
.
Presently, this
dependence is not very well known, but experiments are planned in the near
future.
PACS
13.60.Rj Baryon production
- 12.39.-x Phenomenological quark models
Copyright Società Italiana di Fisica, Springer-Verlag 2000
